2016 Game Bird Hunting Statistics

Transcription

1 216 Game Bird Hunting Statistics Game Bird Program Oregon Department of Fish and Wildlife 434 Fairview Industrial Dr SE Salem, OR 9732 All photos are courtesy of Keith Kohl, ODFW

2 Table of Contents OREGON S GAME BIRDS... 3 UPLAND GAME BIRDS... 3 Management... 3 Game Bird Population Factors... 4 Mortality and Limiting Factors... 4 Habitat is the Key... 5 Hunting Regulations... 5 Population Surveys... 6 Upland Species Description and Information... 9 Ring-necked Pheasant... 9 Sichuan Pheasant Chukar Partridge Hungarian (Gray) Partridge California (Valley) Quail Mountain Quail Ruffed Grouse Blue (Sooty & Dusky) Grouse Sage-grouse Wild Turkey MIGRATORY GAME BIRDS Management Hunting Regulations What is Adaptive Harvest Management? How Does Adaptive Harvest Management Work? Data Collection Migratory Species Description and Information Mourning Dove Band-tailed pigeon Wilson s Snipe Ducks Coot Geese

3 OREGON S GAME BIRDS Diverse habitats, a wide variety of game birds and large expanses of accessible lands provide game bird hunters in Oregon the unique opportunity to pursue game birds up to 9 months out of every year! One or more upland game bird species can be found in nearly every part of the state. Some are native, and some have been introduced, usually to habitats changed in some way by human activities. Oregon is also a major component of the Pacific Flyway which provides staging, wintering and production habitat for millions of ducks, geese and swans, annually. Seven subspecies of white-cheeked (Canada and Cackling) geese reside or winter here and breeding populations of mallards, cinnamon teal, wood ducks, redheads and gadwall are distributed statewide. More than 75, ducks winter in the many marsh, lake and river systems of the state and over 4, Canada geese winter in just the Willamette Valley and along the lower Columbia River. Migratory mourning doves, band-tailed pigeons, coots and Wilson s snipe can also be found in abundance. UPLAND GAME BIRDS Management Upland game birds in Oregon include pheasant, grouse, quail, partridge and wild turkey. Some species such as the sharp-tailed grouse or spruce grouse have no open season and are protected. Hunted species are ring-necked pheasants, mountain and California quail, blue and ruffed grouse, chukar and Hungarian partridge, sage-grouse, and wild turkey. On average about 5, hunters purchase an Oregon upland game bird validation annually. You can find the hunting seasons, bag limits and special regulations for these species in the Game Bird Regulations, which are published annually. Along with the regular seasons, several special hunting opportunities are available including youth hunts and fee pheasant hunts. Information about hunting opportunities, including those on private lands open to hunting can be found on the Oregon Hunting Map (oregonhuntingmap.com). Oregon sets its upland game bird hunting season regulations using a 5-year framework. A multi-year framework provides hunters with consistent seasons between years, while still maximizing recreational hunting opportunity compatible with bird populations. Frameworks are 3

4 based on the concept that annual fluctuations in upland bird populations, which are normal, should not be the basis for setting seasons. Rather, seasons should be based on habitat availability, long-term population trends and other factors. Therefore, population surveys are not used to set regulations annually, but rather are used as part of long-term monitoring. Annual regulations still allow for emergency closures during severe conditions. Game Bird Population Factors Upland game bird populations fluctuate dramatically from year to year, largely due to weather factors. Weather directly affects the physical condition of birds, availability of food and survival of young, but also causes annual changes in habitat that may affect upland birds in several ways. These are short-term factors, which cannot be predicted, changed or controlled. In addition to annual weather variability, overall quantity and quality of habitat governs the long-term condition of a population. Factors such as conversion of older age timber, changes in predominant crop types or farming methods, invasion of exotic plant species in native range, urban expansion and long-term weather cycles are examples of factors that may have lasting impacts on game bird populations. There is a common tendency to think that single factors like predation or hunting regulate populations, especially if the population is lower than the observer thinks it should be. This is seldom the case. Predators, of course, do eat upland game birds and hunters remove some from the population. In reality it is the ultimate fate of almost all birds to be eaten by something. However, this is seldom the factor that limits a population. Mortality and Limiting Factors To further understand what controls population numbers we must make a distinction between "mortality factors" and "limiting factors". Anything that directly kills an animal, such as hunting, predation, disease or accident, is called a mortality factor. Limiting factors, however, are those things that actually restrict or control the size or distribution of an animal population. Numerous studies have revealed that the quality and amount of habitat, behavioral interactions such as territoriality, and weather are the factors that most often limit populations of upland game birds. The "carrying capacity" of an area for upland species is the number of birds the area can support during the most critical time of year, usually winter and early spring. Birds in excess of the carrying capacity are called the "biological surplus." The biological surplus is usually eliminated by death from a variety of causes. The causes of death in upland bird populations (and many other wildlife populations as well) often operate in a "compensatory" way. If predators are abundant in one year, many birds die from predation and fewer birds die from other causes. By the same token, hunting losses may be compensated for by fewer deaths caused by predators, accidents, disease, or other factors. The outcome of compensatory mortality is that the overall mortality rate for the population does not change very much even though causes of death may differ from year to year or from one area to another. Because of compensatory mortality the often-held belief that populations can be "builtup" by not hunting them is a fallacy. Sage-grouse do not fit this paradigm of upland game birds where liberal harvest may have little impact on species exhibiting high reproductive potential. In contrast, sage-grouse are longer lived and have lower reproductive potential. Liberal harvest of 4

5 sage-grouse could result in hunting mortality becoming additive and reducing the subsequent years breeding population. As a result, sage-grouse hunting is managed through a controlled hunt system limiting the number of permits available. An important trait of most game bird populations is that mortality rates are fairly high from one year to the next. For example, the annual mortality rate for quail is typically 6 to 8 percent. Not all species have such high mortality rates, but nearly all upland birds produce large broods and exhibit consistently high annual turnover. The reason mortality rate does not change much is that after populations drop to a certain level, sometimes called the "threshold of security," the remaining members become safer from additional loss to predation, disease or similar factors. For example, at some point, it is no longer efficient for a predator to search for the last few quail or chukar in an area because it requires more energy than can be taken in and predators seek alternative prey. Even chance meetings between prey and predator become fewer. In a similar way, hunters reduce effort when game numbers are low and birds are difficult to find. Some factors do not operate within the bounds of compensatory mortality. Severe weather conditions, for example, may reduce a population well below the level it would have reached under normal conditions. Fortunately, upland bird populations display an extraordinary resiliency to such occurrences. If the number of birds that survive a critical period is especially low, the productivity of adults and survival of young is often unusually high. Biologists call this relationship "inversity". Upland game birds produce large broods and a dramatic increase in the population can take place in a short time. Many of the mortality factors acting upon upland game birds really do not limit the population even though they cause the deaths. Of the limiting factors, behavioral and weather factors that affect populations cannot be changed. But habitat, the most important limiting factor for upland game birds, can often be improved. Habitat is the Key The quantity and quality of habitat is important, and affects the way limiting factors work in upland game bird populations. For compensatory mortality, inversity and the threshold of security to function normally, there must be the proper amounts and distribution of habitat needs, such as food, escape cover, water, nesting areas, etc. If the habitat is limited or if any of these needs is restricted in its distribution, mortality factors, such as hunting, disease or predation, may actually limit local populations. A site may contain most of the needed elements for a pheasant population, but if even one part, like secure nesting areas or winter cover, is missing, the carrying capacity for that area is reduced. If habitat inadequacies cause the population to be very concentrated, disease may spread quickly through the population or predators may reduce numbers well below the carrying capacity. Hunting Regulations For upland game birds that live in areas with adequate habitat, population size and mortality rate are affected little by regulated hunting. Protection of game birds from hunting will not allow the population to increase. Because of the normally high mortality rate, even without hunting, 5

6 and because hunting typically is compensatory, upland game birds cannot be "stockpiled" from one year to another. Thus, area or season closures for populations in good habitat are not needed and do little or no good. Setting bag limits and possession limits can be very difficult. These types of regulations for game birds in good habitat serve much more to spread the harvest among hunters than to protect the population. In a few instances regulations are necessary to safeguard populations, e.g. for sage-grouse. Hunting of game birds that occur only in a very small area, that are suffering declines because of poor habitat, or that are concentrated during the hunting season (at watering sources, for instance) may have the potential to limit the population, and regulations must be carefully applied to such species. For healthy populations, though, hunting is "self-limiting." This means that as the biological surplus is removed, hunters tend to lose interest in the last few birds on an area, and hunting effort falls off. The remaining birds become skilled at dodging hunters and the population achieves a measure of security. The concepts described above help explain why it is possible to have fairly liberal hunting seasons for most upland game birds without jeopardy to the population. ODFW conducts annual harvest surveys to determine statewide hunter effort and take for upland birds as well as other species. These surveys generally occur during or just after hunting seasons and are conducted via telephone. Randomly selected hunters who purchased an upland game bird validation are contacted surveyed for activity. However, in some prior years ODFW was not able to complete the surveys. ODFW continues to strive to improve harvest surveys so that accurate information can be obtained annually. Information in this book provides you the best data available. See the map on the following page for the geographical areas used for upland game bird harvest surveys. Population Surveys Population information on upland game birds is sometimes difficult to obtain. Wildlife biologists collect trend information to help describe game bird highs and lows. This information tells us very little about the total population or absolute number of any particular species, but does give biologists an index to long-term trends of the population. Conditions such as weather, changing habitat, and time of year influence the ability of the surveyor to conduct comparable surveys from one year to the next. For example, in wet years annual plant growth is often greater, reducing visibility and the ability to detect birds, resulting in an apparent downward trend. Consequently, when you are looking at trend data, be cautious about short-term interpretations. Trend data is meant to show changes in the population over the long-term. Generally when trend data is high more birds can be found, when trend data is low fewer birds are likely to occur. Other methods, such as lek (strutting areas) counts for sage-grouse, may prove to be more accurate for estimating population trends in a certain area during a given year, being careful to take into account the habitat factors from year to year. Survey of upland game bird harvest by area during the 216 season (Table 1 and Figure 1) showed a decline in harvest for all species compared to the previous season and the 1-year average (Figure 2). Above average snow pack and cold temperatures reduced survival in some areas of eastern Oregon and limited hunter access. Rankings of the 1-year average number of hunters (participation) by species, show that forest grouse (ruffed grouse followed by blue grouse) have the most hunters followed by California quail, pheasant, and then chukar. Few 6

7 people hunt for mountain quail and Hungarian partridge. Ranking average annual harvest by species, chukar have the highest harvest, followed by ruffed grouse, California quail, pheasant, and blue grouse. Mountain quail and Hungarian partridge fell at the bottom of the list for average annual harvest (Table 2). Table 1: 216 Upland game bird harvest by game bird area (See map of areas below). 216 Upland Game Bird Harvest by Area Area 1 Area 2 Area 3 Area 4 Area 5 Area 6 Area 7 Statewide Blue Grouse 3,726 1,32 1, , ,319 Ruffed Grouse 12,646 5,479 2,445 2,841 6, ,936 Mountain Quail 1,876 3, ,64 California Quail 1, , , ,467 24,82 Chukar 817 3,191 8,385 1,367 17,26 3,786 Hungarian Partridge Ring-necked Pheasant 2, ,668 1,597 3,466 1,42 3,91 18,583 Figure 1: Oregon upland game bird harvest areas. 7

8 45, 4, 35, 3, 25, 2, 15, 1, 5, Hunters Harvest Blue Grouse Ruffed Grouse Mountain Quail California Quail Chukar Hungarian Partridge Pheasant Figure 2: Ten year average of the number of upland game bird hunters and harvest by species, Table 2: Rankings of average number of hunters and harvest by upland game bird species, (1-year average). By Participation By Harvest Ranking Species Hunters Ranking Species Harvest 1 Ruffed Grouse 13,268 1 Chukar 43,235 2 Blue Grouse 12,41 2 Ruffed Grouse 35,285 3 California Quail 8,717 3 California Quail 34,33 4 Ring-necked Pheasant 7,95 4 Ring-necked Pheasant 26,349 5 Chukar 6,324 5 Blue Grouse 16,274 6 Mountain Quail 5,666 6 Mountain Quail 11,397 7 Hungarian Partridge 1,646 7 Hungarian Partridge 6,9 8

9 Upland Species Description and Information The following provides information on upland game bird species in the state and the most complete population and harvest information available to date (through 216). Long-term data presented here in combination with information released during the year by the department, such as the Fall Hunting Forecast, will greatly assist hunters in upcoming seasons. Ring-necked Pheasant In 1882, the Willamette Valley of Oregon was the site of the first successful introduction of ring-necked pheasants in the U.S. Those birds were transported by sea directly from China by Judge Owen Denny. The transplanted birds found perfect habitat and soon populations burgeoned into the tens of thousands. The ring-necked pheasant thrives best where farming is the least efficient. In earlier times farming practices and the landscape were different than today and pheasants were more abundant. Farming techniques were primitive, field sizes smaller and crops more diversified. For years pheasants were a common by-product of most normal farming operations. However, over the last several decades, pheasant numbers in Oregon have declined as agriculture has evolved into a more highly efficient industry (Figure 3). Pheasants continue to exist at levels consistent with a different landscape, especially in eastern Oregon, but without extensive changes in habitat they will never reach levels seen in earlier times. Pheasant populations in western Oregon and some areas in eastern Oregon have been severely limited by intensive agriculture and loss of habitat. In other areas pheasants have continued to do well and have even shown localized increases where the Conservation Reserve Program has been implemented under the 1985 Farm Bill and subsequent Farm Bills. There is little likelihood that more restrictive seasons or bag limits will cause populations to increase. There is considerable evidence, however, that improvements in habitat could achieve significant upward changes in populations in most areas of the state that previously supported abundant pheasant populations. The department is working with private landowners, and sports groups such as Pheasants Forever and the Oregon Hunters Association to improve habitat for upland wildlife. 9

10 2 18 Birds/1 mi. Chicks/Hen Number of Pheasants Figure 3: Eastern Oregon pheasant population trends from summer counts of the number of birds per 1 miles of the survey route and number of chicks per hen pheasant, Even areas with limited pheasant numbers can continue to provide hunting since only roosters are legal game. Pheasants are polygamous and relatively few roosters are required to breed all available hens. Nowhere in Oregon has a wide disparity between numbers of hens and roosters been seen following fall hunting seasons. Usually the post-season rooster:hen ratio runs between 1:2 and 1:4. Ratios as wide as 1:1 have been demonstrated to provide adequate egg fertility. Ring-necked pheasants are among the most sought after upland game bird in Oregon, with an average of 13,79 hunters annually pursuing these birds. Pheasant harvest from averaged approximately 48,118 birds per year, with the most recent 1-year average at 26,349 birds per year. During the 216 hunting season approximately 18,583 pheasants were harvested in Oregon (Figure 4). Based on 1-year average annual harvest, game bird area 3 was the most productive with an average annual harvest of 9,89 followed by area 7 with 9,14, and area 5 with 3,41 birds (Figure 5). 1

11 1, 9, 8, 7, 6, 5, 4, 3, 2, 1, Hunters Harvest Figure 4: Estimated number of pheasant hunters and harvest, Figure 5: Average number of ring-necked pheasant harvested and number of hunters by upland game bird harvest area,

12 Sichuan Pheasant Oregon does offer another subspecies of pheasant, the Sichuan pheasant, which appears very similar to ring-necked pheasants, except that males lack the characteristic white neck-ring. Another, important difference is in their habitat preference. The best information suggests that Sichuans are not as dependant on cereal grains and tend to select brushy or mixed forested habitats, especially for nesting. Sichuans were primarily released on the margins of the Willamette, Umpqua and Rogue valleys of western Oregon with intent of establishing pheasants in a region where ring-necked pheasant populations had declined to very low levels. From , 24,878 Sichuans were released in 14 townships-sized areas. Though not present in large numbers, a few birds still persist on the western and eastern edges of the Willamette Valley, particularly in portions of Linn, Polk and Benton counties. Chukar Partridge The chukar partridge is an introduced species originating from India. The first successful releases in Oregon began in 1951 and, over several decades, chukars were released into suitable areas east of the Cascade Mountains. Extensive areas in eastern Oregon provide ideal habitat for chukars. Cheatgrass, another introduced species, had already become well established through much of eastern Oregon prior to the 195s. Cheatgrass provides one of the most important yeararound food resources for the chukar. Chukar habitat in Oregon is both widespread and secure and has not changed greatly in most Oregon chukar ranges since the 195s. Much of Oregon's chukar habitat is in public ownership and under management by the Bureau of Land Management or U.S. Forest Service. It is generally steep, rocky, dry, and largely unsuitable for development, agriculture or other commercial uses, except grazing. By its nature these areas are usually difficult to hunt, but at the same time offer one of Oregon s greatest upland game bird hunting opportunities. Chukar populations have exhibited rather dramatic fluctuations since their introduction. Although no formalized population surveys were begun until about 1961, numbers in the late 195s are generally thought to have been abundant. The highest all-time levels occurred in the mid 2s. Chukar numbers have been fairly low in recent years (Figure 6). Annual weather patterns such as severe winters and drought probably influence chukar populations more than any other factor. 12

13 Birds/1 mi. Chicks/Adult Number of Chukar Figure 6: Chukar population trend from summer counts of the number of birds per 1 miles of the survey route and number of chicks per adult, With no other species is the self-limiting nature of upland bird hunting better demonstrated than with chukars. During years when populations are low or snow limits access, hunting pressure and harvest diminishes dramatically. The reverse is also true. Research in Nevada found harvest rates during poor population years as low as 1% of the population. In good years, however, harvest rate have approached 3%. However, populations have on numerous occasions demonstrated the ability to quickly rebound without implementation of restrictive harvest regulations. During the past several decades the chukar partridge is the most harvested upland bird in Oregon. Average harvest for the last 1 years is estimated at 43,235 birds annually (Figure 7). The majority of the harvest comes from game bird area 7, followed by area 5, and area 3 (Figure 8). 13

14 25, Hunters Harvest 2, 15, 1, 5, Figure 7: Estimated number of chukar hunters and harvest, Figure 8: Average number of chukar harvested and number of hunters by upland game bird harvest area,

15 Hungarian (Gray) Partridge The Hungarian partridge was first introduced into western Oregon in 19 and in eastern Oregon in Initial stock was imported from central Europe, with later releases of game farm raised birds. Although localized populations may have become established for a time in western Oregon, the species was generally not successful, and no populations are presently found west of the Cascade Mountains. In eastern Oregon the largest populations exist in Columbia and Snake River basin counties. The best habitat and the most stable populations are found in bunchgrass and sagebrush foothill habitats adjacent to farmlands, although some birds may be found many miles from the nearest farmland. Private lands that have been put into the Conservation Reserve Program (CRP) can also provide suitable habitat for Huns. The population in Oregon appears to be stable (Figure 9). 9 8 Birds/1 mi. Chicks/Adult Number of Hungarian Partridge Figure 9: Hungarian partridge population trend from summer counts of the number of birds per 1 miles of the survey route and number of chicks per adult, Hungarian partridge are the least harvested upland game bird in Oregon and are usually hunted incidentally with chukars and pheasants. Annual harvest is highly variable (Figure 1). The last 1 years, an average of 1,646 hunters harvested 6,9 Huns annually. Except in years when populations are particularly abundant, hunting activity and harvest usually remains relatively low. Since 199, the average birds per hunter has been highly variable from a low of.7 in 216 to a high of 11.7 birds per hunter in 214. Most harvest comes from game bird area 7, 5 and 3 (Figure 11). 15

16 3, Hunters Harvest 25, 2, 15, 1, 5, Figure 1: Estimated number of Hungarian partridge hunters and harvest, Figure 11: Average number of Hungarian partridge harvested and number of hunters by upland game bird harvest area,

17 California (Valley) Quail California quail are among Oregon's most widely distributed game bird and are found in urban, agricultural and wildland habitats. They may be found associated with pheasants on agricultural land or with chukars along stream courses in desert environments. The California quail is a native bird originally confined to the counties bordering California and Nevada. They were transplanted to most areas of the state so long ago (beginning as early as 187) that most Oregonians do not realize they were not native in most of Oregon. California quail are adaptable to the degree that they can be found associated with agricultural and urban areas, as well as in riparian habitats located miles from human habitation. Within these areas, however, California quail habitat needs are rather specific. California quail feed on a wide variety of plant species, mostly weed species. They require a combination of brushy escape cover with adequate roosting areas (off the ground) and more open areas for feeding. California quail are somewhat vulnerable to severe winter conditions, but populations have generally been stable over a long period of time in eastern Oregon and have actually increased in recent years (Figure 12). Because they nest somewhat later than most other upland species, they often are unaffected by late spring storms which can reduce nesting success and survival for other species. In western Oregon numbers declined during the late 197s, probably due to changing agriculture practices, but have remained relatively stable since. 35 Birds/1 mi Chicks/Adult 3 Number of California Quail Figure 12: California quail population trends in eastern Oregon from summer counts of the number of birds per 1 miles of the survey route and number of chicks per adult, California quail rank third in the average annual harvest for upland game bird species. An average of 34,33 California quail were harvested annually by 8,717 hunters the past 1 years (Figure 13). California quail are most often hunted in conjunction with other species. This is evident when comparing areas with the highest harvest of upland game birds. Over the last 1 years, California quail harvest has been highest in area 7 (16,795 quail), area 3 (5,696 quail), and 17

18 area 5 (3,157 quail), although a decent number are harvested in all areas making them a popular species to hunt (Figure 14). 14, 12, Hunters Harvest 1, 8, 6, 4, 2, Figure 13: Estimated number of California quail hunters and harvest, Figure 14: Average number of California quail harvested and number of hunters by upland game bird harvest area,

19 Mountain Quail Mountain quail are native birds found on both sides of the Cascade Mountains. Unlike California quail, they usually exist in widely separated family groups rather than large coveys. They thrive in the natural brushlands of southwestern Oregon and are also found in northwestern Oregon when such areas are created by logging, fire or other disturbance. Greatest abundance occurs in southwestern Oregon, gradually decreasing as the species moves north. Mountain quail populations in western Oregon are stable (Figure 15). Eastside populations are strongly dependent on brushy and diverse riparian habitat, and have disappeared or declined as many of these habitats have deteriorated. Habitat improvements throughout Oregon hold out the strong possibility for population improvement through natural dispersal and trap and transplant Birds/1 mi. Chicks/Adult Number of Mountain Quail Figure 15: Mountain quail population trend in western Oregon from summer counts of the number of birds per 1 miles of the survey route and number of chicks per adult, In western Oregon, mountain quail provide some of the most difficult game bird hunting available because of the brushy and often steep nature of mountain quail habitat and the tendency of birds to run in heavy cover. In eastern Oregon, populations are well below historic levels as they are throughout the intermountain regions of the west. However, in the last 2 years, the population and distribution of mountain quail in eastern Oregon have been increasing, particularly in the John Day River Basin. Increasing populations in Eastern Oregon should provide more recreational opportunities in the future. Since 21, the department has been trapping mountain quail in southwestern Oregon and releasing them in select areas of suitable habitat in eastern Oregon where the birds are rare or non-existent. The translocated birds are being monitored after release to determine survival and nesting success. Those who spend time outdoors in eastern Oregon are encouraged to report 19

20 observations of mountain quail to any ODFW office or the upland game bird program (See page 17 of the Game Bird Regulations). The mountain quail is one of Oregon's least hunted upland bird species, though more hunters pursue mountain quail then do Hungarian partridge. Annually, an average of 5,666 hunters harvest an estimated 11,397 mountain quail (Figure 16). Since harvest is reduced (to allow small incidental take) or closed in eastern Oregon, the majority of harvest occurs in western Oregon. The 1-year average annual harvest in area 2 was 5,52 and in harvest area 1 was 3,465 mountain quail (Figure 17). 6, 5, Hunters Harvest 4, 3, 2, 1, Figure 16: Estimated number of mountain quail hunters and harvest,

21 Figure 17: Average number of mountain quail harvested and number of hunters by upland game bird harvest area, Ruffed Grouse The ruffed grouse is a native bird that resides in most wooded sections of the state. It is a bird of edge habitats, preferring mixed hardwoods or a combination of hardwoods and conifers. Its abundance varies with the quality of the habitat, and varies locally as the habitat changes through natural succession or alteration due to logging, fire or development. Ruffed grouse are most commonly found in brushy riparian areas in eastern Oregon and in early-aged mixed woodlands in western Oregon, although birds may be found in pockets of good habitat nearly anywhere. Population inventory has proven difficult in Oregon. Especially in western Oregon, birds are dispersed at low to moderate densities through highly variable habitat. It appears that populations are fairly stable overall although varying locally over time, and perhaps cyclic in nature. In eastern Oregon populations appear to be stable over time with an upsurge in some areas during the mid-198s (Figure 18). 21

22 6. 5. Birds/1 mi. Chicks/Adult Number of Ruffed Grouse Figure 18: Statewide Ruffed grouse population trends from summer counts of the number of birds per 1 miles of the survey route and number of chicks per adult, The 1 year average for ruffed grouse harvest in Oregon averages 35,285 birds for 13,268 hunters annually (Figure 19). This produces approximately 2.7 ruffed grouse per hunter, with results varying greatly from year to year. Ruffed grouse hunters are encouraged to help ODFW learn more about ruffed grouse by saving one wing and tail of any bird they harvest (see page 25 in Game Bird Regulations). These wings/tails are turned into ODFW where biologists can learn much by examining them, such as age, gender, and approximate hatch date for juvenile birds. Although yearly harvest varies greatly, average annual harvest is highest in area 1 (12,449 grouse), followed by area 2 (1,624 grouse), and area 5 (5,245 grouse, Figure 2). 22

23 12, 1, Hunters Harvest 8, 6, 4, 2, Figure 19: Estimated number of ruffed grouse hunters and harvest, Figure 2: Average number of ruffed grouse harvested and number of hunters by upland game bird harvest area,

24 Blue (Sooty & Dusky) Grouse Blue grouse have been divided into two separate species because of differences in plumage, breeding behavior, and color of bare-skinned areas. Oregon has both of these species, sooty and dusky grouse, which are collectively referred to as blue grouse. Sooty grouse occupy the coniferous forests of western Oregon, the eastern slopes of the Cascade Mountains, Klamath Basin, and south Warner Mountains. Dusky grouse occupy the Wallowa and Blue mountains of northeastern Oregon. Blue grouse inhabit timber edges, open timbered slopes and breaks of the mountains usually adjacent to springs or other sources of water. In western Oregon trend data shows a decline in population from the early 197s. This is believed to be largely a reflection of changing forest habitats. ODFW biologists are conducting hooting surveys of male sooty grouse in western Oregon, although it is too early in the survey to detect trends based on the number of hooting males encountered. In northeastern Oregon populations have been at higher than average levels during most of the 198s, lower during the early 199s. The population peaked in early 2s and has been declining since (Figure 21). Population surveys and harvest data suggest populations of blue grouse exhibit cycles in eastern Oregon, reaching highs every years. 9 8 Birds/1 mi. Chicks/Adult Number of Blue Grouse Figure 21: Statewide blue grouse population trend from summer counts of birds per 1 miles of the survey route and number of chicks per adult, Forest grouse are widely distributed in the state. While they do not receive much publicity, blue and ruffed grouse are among the most hunted upland game bird species because of the popularity of hunting forest grouse in conjunction with deer and elk. The 1-year average annual harvest for blue grouse is estimated at 16,274 birds for 12,41 hunters (Figure 22). The average harvest is 1.4 birds per hunter (compared with 2.7 for ruffed grouse). Blue grouse hunters are also asked to help biologist by submitting one wing and the tail from each bird harvested (See page 25 in the Game Bird Regulations). 24

25 As with ruffed grouse, blue grouse harvest varies between years. The 216 season was down slightly for many grouse hunters. The 1-year average harvest for area 1 was estimated at 4,869 blue grouse, followed by Area 2 with 3,669 birds harvested (Figure 23). 5, 45, 4, 35, 3, 25, 2, 15, 1, 5, Hunters Harvest Figure 22: Estimated number of blue grouse hunters and harvest,

26 Figure 23: Average number of blue grouse harvested and number of hunters by upland game bird harvest area, Sage-grouse Sage-grouse were originally found through much of the sagebrush dominated areas of eastern Oregon, but were eliminated from large areas by the mid-19s through conversion of land for agricultural purposes. There has been little change in sage-grouse distribution since the 195s. Early accounts indicate sage-grouse populations have fluctuated greatly during the last century. There were periods of great scarcity when the extinction of the species was predicted and also periods when numbers increased and hunting seasons were authorized. Peak populations occurred around 1918 and during the late 194s and late 195s. Systematic monitoring of sage-grouse populations in Oregon did not begin until the late 195s and early 196s and even then it was only a small sample. Beginning in the late 199s survey efforts increased and currently biologist annually survey more than half of approximately 1, known leks (leks are breeding display areas) in Oregon. Sage-grouse populations can vary greatly over time, but there has been a declining trend over the long term (Figure 24). Oregon s minimum spring breeding population was estimated at 22,218 sage-grouse in

27 5 Min. Spring Population Estimate (in thousands) Figure 24: Sage-grouse population trends from minimum spring breeding estimates, Harvest for sage-grouse has varied greatly since about 195. Total harvest reached 21,284 in 1958 and dropped to only 117 in 1982, with 17 years of closed seasons scattered throughout 195 to With population fluctuations and limited control over hunter distribution during general seasons, ODFW adopted a limited-entry controlled sage-grouse hunt in Oregon offers one of the most conservative sage-grouse hunting seasons of any state. Since 1989 permit numbers statewide ranged from a low of 75 in 1991 to a high of 1,3 in 25 and 26, with the bag limit and season limit of two sage-grouse. Since 23, an average of 675 hunters have harvested an average of 752 sage-grouse annually (Figure 25). 27

28 1,4 1,2 Hunters Harvest Tags Authorized 1, Figure 25: Estimated number of sage-grouse hunters and harvest, Twelve wildlife management units have authorized sage-grouse seasons with permit numbers varying greatly between units. The Beatys Butte and Beulah units each had 15 permits available in 216 while the Sumpter and Lookout Mt. units did not have any permits available. The Beatys Butte unit had the highest estimated harvest in 216 with 193 birds, followed by the Whitehorse unit at 88 birds. Birds per hunter by management unit during last season ranged from. to 1.7. Over the last 5 years, harvest averages about 1 sage-grouse per active hunter per season. Sage-grouse have a lower level of productivity, but are generally longer-lived than most other upland species. Also, during dry years, production may decrease and they may be concentrated in the vicinity of water sources and wet meadows during fall. To reduce the risk of over exploitation, hunting effort is allocated through a controlled hunt system where available permits for each unit are based on several factors including estimated population and past hunter effort and success. Permits numbers are determined annually are conservatively designed to take no more than 5% of the estimated population. Wild Turkey The wild turkey is an introduced species, which has adapted especially well to many parts of Oregon that have been altered in various ways by human activities. The first successful establishment of turkeys in Oregon occurred in 1962 with the importation of 58 Merriam s turkeys from Arizona, New Mexico and Colorado. While moderately successful in parts of eastern Oregon, the Merriam s subspecies took a strong hold only on the lower eastern slopes of Mt. Hood. While a rapid expansion followed introduction, the population dropped back after an initial peak to lower levels. Additional transplants of the Merriam s subspecies resulted in only moderate success. In 1975, the Rio Grande subspecies was introduced experimentally in Jackson County and it quickly became apparent that this bird would do well throughout southwestern Oregon. The 28

29 subspecies also proved adaptable in other areas of the state, including eastern Oregon. Since the early 198s, all management efforts have focused on the Rio Grande subspecies. Turkeys are no longer being moved to or introduced to new areas of the state. Each year ODFW works with agricultural producers, home owners, and other land managers to alleviate damage caused by nuisance turkeys. In urban and suburban areas, most issues are caused by supplemental feeding (both deliberate and unintentional). Generally problems are dealt with by allowing hunting, hazing, removing attractants, and issuing kill permits. Wildlife managers across the country are still seeking a reliable method to consistently inventory wild turkey populations. It is evident; however, that turkey numbers and range steadily increased in Oregon through about 21 and has since leveled off. Correspondingly hunter interest, hunting participation and turkey harvest have also increased. The statewide spring turkey season has increased in popularity in recent decades. During the spring season only male turkeys or a turkey with a visible bird are legal to harvest. Hunter participation has been increasing from an estimate of 2,623 in 1989 to a high of 15,344 in 21 with a recent 5-year average of 13,182 hunters per season. Estimated harvest ranges from a low in 1989 of 313 turkeys to a high of 5,437 in 21. The average harvest for the last 5 years is estimated at 4,384 birds annually or.3 birds per hunter (Figure 26). Success is the highest in the Rogue, Melrose, and Applegate units (Figure 27). 16, 14, 12, Hunters Harvest 1, 8, 6, 4, 2, Figure 26: Estimated number of spring turkey hunters and harvest,

30 Figure 27: Spring turkey success by wildlife management unit (WMU). Oregon's spring turkey season is among the most liberal in the U.S. and Oregon's turkey population and range is continuing to expand. Harvest is closely monitored through mandatory reporting on turkey tags to determine whether any season parameters warrant change in the future. The long season provides abundant opportunity to hunt turkeys with fewer of the competitive pressures imposed by a shorter season, and the opportunity to take several birds. Breeding begins as early as late February, with most occurring by the mid-april season opener. Research has shown that hunting activity while hens are nesting has little adverse effect on production. A spring youth turkey season started in 26 and occurs the first full weekend before the general season opens. The youth season has been very successful as seen by the high harvest rate of turkeys by youth hunters. In 216, more than 2, youth held spring turkey tags and 455 turkeys were harvested by youth just during the youth turkey season. Youth harvested an additional 423 turkeys during the general spring season in 216. Youth accounted for 16.7% of spring harvest of turkeys in Oregon during 216 and 16.6% of the spring harvest in 215. Fall turkey hunting opportunities in Oregon have expanded as well. During the fall season, hunters can harvest a turkey of either sex. Hunters can purchase up to two fall turkey tags, of which only one can be an eastern Oregon fall turkey tag. In 216, there were 3 general seasons that each offered a limited number of tags on a first-come, first-serve basis. Four thousand general season tags were offered in western Oregon, 5 tags in the Blue Mountains, and 45 tags in the Northeast. One controlled hunt with 5 tags was offered during the fall season in the White River and part of the Biggs unit. Fall seasons began in 1993 in Douglas County, when 3

31 only 5 permits were available. As the turkey populations have increased, the fall turkey hunting opportunities have increased as well (Figure 28). In 216, a total of 3,468 fall turkey tags were issued. Interest in fall hunting appears to be limited with some tags remaining unclaimed for western Oregon, although tags for eastern Oregon sold out. Currently, the 5-year average for fall turkey harvest is around 86 birds with 1,88 hunters. In 216 the highest harvest was in the Willamette and Rogue units in western Oregon, the Heppner and Ukiah units in the Blue Mountains, and the Starkey, Wenaha, and Sled Springs units in the Northeast. 6, Tags Available Hunters Harvest 5, 4, 3, 2, 1, Figure 28: Estimated number of fall turkey hunters, harvest, and tags available,

32 MIGRATORY GAME BIRDS Management Migratory game birds are those species that occur in multiple geographical areas during different stages of their life history. Generally these birds nest and raise young in one area then move to more suitable habitats and climates to spend the winter. Oregon species include two groups, upland (mourning doves, band-tailed pigeons, and Wilson s snipe) and waterfowl (ducks, geese, mergansers and coots). Annually about around 2, hunters pursue migratory game birds in Oregon. When managing for these species, coordination between states and countries is vital to maintain healthy and sustainable populations. North America is divided into four general migration corridors called flyways. These include the Pacific, Central, Mississippi and the Atlantic flyways. The Pacific flyway reaches from Alaska to Mexico encompassing all the states west of the Rocky Mountains. Oregon is a major component of the Pacific flyway providing nesting, staging, and wintering habitat for millions of birds annually. Ultimate regulatory authority for all migratory game birds lies with the U.S. Fish and Wildlife Service (USFWS), along with Mexican and Canadian federal authorities. The Pacific Flyway Council, which includes state representatives from all western states, along with other flyway councils, provide management recommendations to the USFWS for regulations affecting these species. Hunting Regulations Hunting regulations, season structure and species bag limits are formulated annually, based on habitat conditions, breeding population status and production estimates. For ducks, a process called Adaptive Harvest Management (AHM) has been adopted by the USFWS and flyway councils to assist in setting annual regulations. For most duck species population levels and associated hunting opportunities have been maintained despite highly variable habitat conditions. However, the annual process of setting regulations has been controversial. Debates over appropriate regulations are frequent among 32

33 hunters, managers and the public-at-large. Much of the controversy stems from uncertainty about the role of harvest in population dynamics. As a consequence, managers are unsure about how much regulations should be restricted when populations are declining, or how much they can be liberalized when populations are increasing, and when those regulatory changes should be made. As a result, AHM was introduced in 1995 to help managers better understand the impacts of regulations on waterfowl harvest and population levels. The concept was developed by federal, state and university biologists recognized as leaders in waterfowl management. In addition, a team of representatives from the USFWS, the flyway councils, the Association of Fish and Wildlife Management Agencies have been working together to help ensure that benefits are realized. The cooperative development of the AHM is a historic achievement in the conservation of waterfowl in North America. AHM is intended to provide an objective, informed and less contentious decision making process by explicitly defining a role for monitoring programs in setting regulations and formalizing a coherent framework for addressing controversial harvest management issues. What is Adaptive Harvest Management? AHM is a systematic process for dealing with uncertainty inherent with waterfowl management. The key components of AHM include: 1) a detailed description of the objectives of harvest management by which management alternatives can be evaluated; 2) a limited number of regulatory alternatives; 3) a set of alternative models describing population dynamics; and 4) a measure of reliability (probability or weight ) for each model. How Does Adaptive Harvest Management Work? Duck hunting regulations are based in large part on the status of mallards because they are the most abundant species in the harvest and are relatively good indicators of the status of other species. The duck season in the Pacific Flyway is based on the status of western mallards. These mallards are divided into two sub-stocks, those breeding in Alaska and those breeding in the southern Pacific Flyway (California, Oregon, Washington, and British Columbia). The optimal regulatory strategy is determined based on the current regulatory alternatives, population model and parameter estimates, and the objective to maximize long-term cumulative harvest. Data collected in Oregon during the annual waterfowl breeding population survey and duck banding efforts on Wildlife Areas are used along with data from other states to estimate population size and modeling parameters in the western mallard model. The three regulatory alternatives (restrictive, moderate, and liberal) are determined based on the number of breeding mallards in the Alaska and southern Pacific Flyway sub-stocks and contain specific season lengths and bag limits. More restrictive regulations for Northern Pintail, Scaup, and Canvasback are determined separately using species specific models in order to regulate harvest more closely. The regulatory decision process is initiated for the upcoming hunting season almost a year in advance, which is before spring waterfowl surveys are conducted to estimate the breeding population and habitat conditions. As a result, AHM has to make adjustments to account for uncertainties in the resource status of the time of the decision making process. Once a regulatory decision is made, each waterfowl model predicts whether population size will go up or down, 33

34 and by how much. After data from the spring population survey are available, it is possible to see how well each model predicted the change in population size. The model(s) that make good predictions earn more points. The model(s) that do not make good predictions lose points. In essence, AHM allows a fair fight among competing models, with data from monitoring programs serving as a referee. This evaluation process would be repeated each year. By updating model weights and optimizing regulatory choices, the process should eventually identify which model is most appropriate to describe the dynamics of the managed population. The process is optimal in the sense that it provides the regulatory choice each year necessary to maximize management performance. It is adaptive in the sense that the harvest strategy evolves to account for new knowledge generated by a comparison of predicted and observed population sizes. Data Collection The data presented in this section was derived from several sources. The upland migratory game bird information is a combination of state and federal surveys. The majority of the waterfowl data is derived from federal hunter, breeding bird and winter population surveys. Waterfowl production and fall flight numbers are estimated annually from breeding bird surveys conducted in areas that contain historic bird concentrations. These areas include Alaska, northern and prairie Canada and the U.S. Beginning in 1994, Oregon initiated its own comprehensive aerial surveys to determine the waterfowl breeding population within the state. This information was combined with survey results from Canada and other states to assess waterfowl breeding populations. Winter and other special counts are also conducted annually in some traditional bird concentration areas. These surveys provide population trend estimates as well as winter bird distribution patterns. 34

35 Migratory Species Description and Information Unlike other upland game birds that reside in the state all year long, Oregon s migratory upland game birds generally spend only a portion of the year in the state, either nesting, wintering or just passing through on their way to other areas. Oregon has three species classified as migratory upland game birds the mourning dove, band-tailed pigeon and Wilson s snipe. Oregon s huntable migratory waterfowl include ducks, mergansers, geese and coots. It is important to remember that, as the name migratory suggests, these birds travel great distances through many states and even countries. The Migratory Bird Treaty Act of 1918 was signed by the U.S., Canada, Russia, Japan and Mexico to manage these birds cooperatively so that populations could be protected and hunting controlled. Mourning Dove The mourning dove, named for its mournful call, is one of the most abundant and widely distributed birds in the U.S. Doves nest from southern Canada to Mexico, in a variety of habitats ranging from open grasslands to tree and shrub areas. Mourning doves migrate south to winter in the southern U.S., Mexico and Central America, although small numbers do winter in western Oregon. Doves that were banded in Oregon have been recovered in California, Nevada, Arizona, and the western highlands of Mexico. Breeding bird surveys for doves (counting adult doves during the summer) suggest a downward trend over the past 5 years in Oregon and an inconclusive trend for the past 1 years. Absolute abundance of mourning doves estimated from banding data shows a relatively stable trend over the past couple years (Figure 29) for the western U.S. (Washington, Idaho, Oregon, California, Nevada, Utah, and Arizona). In 216, Oregon hunters harvested an estimated 27,2 doves. In comparison, hunters in Arizona, California and Texas respectively harvested 395,8, 9,2, and 5,155,3 doves in 216 (Figure 3). Dove hunting in southwestern states is more productive and popular than in Oregon due to higher productivity and larger concentrations of birds. 35