96-602: The Rocky Mountain Arsenal National Wildlife Refuge is a 15,988-acre (24.981 sq mi) National Wildlife Refuge located adjacent to Denver and Commerce City, Colorado , in the United States. It is approximately 8 miles (13 km) northeast of downtown Denver . The refuge is on the grounds of the former Rocky Mountain Arsenal , a United States Army chemical weapons manufacturing facility. The site
192-471: A United States Postal Service facility. Section 5(a)(1) of the act designated another 815 acres (3.30 km) for public sale. The former Shell Oil Company land also proved to be a problem, as it was somewhat geographically isolated from the rest of the refuge and not likely to be used by wildlife as habitat. Subsequently, about 100 acres (0.40 km) of the Shell Oil site was sold to Commerce City in 2010. Of
288-664: A broad spectrum of service programs by enforcing conservation laws established to protect the fish, wildlife, cultural, and archaeological resources the service manages in trust for the American people. They also educate the public about the FWS's mission, contribute to environmental education and outreach, provide safety and security for the visiting public, assist local communities with law enforcement and natural disaster response and recovery through emergency management programs, and help protect native subsistence rights. They are routinely involved with
384-519: A code of ethics which prohibits its members from deliberately crossbreeding bison with any other species. Population estimates in 2010 ranged from 400,000 to 500,000, with approximately 20,500 animals in 62 conservation herds and the remainder in approximately 6,400 commercial herds. According to the IUCN , roughly 15,000 bison are considered wild, free-range bison not primarily confined by fencing. The Nature Conservancy (TNC) has reintroduced bison to over
480-484: A dozen nature preserves around the United States. In October 2016, TNC established its easternmost bison herd in the country, at Kankakee Sands nature preserve in Morocco , Newton County, Indiana . In 2014, U.S. Tribes and Canadian First Nations signed a treaty to help with the restoration of bison, the first to be signed in nearly 150 years. American bison live in river valleys, and on prairies and plains. Typical habitat
576-475: A few older males. During the breeding season, dominant bulls maintain a small harem of females for mating. Individual bulls "tend" cows until allowed to mate, by following them around and chasing away rival males. The tending bull shields the female's vision with his body so she will not see any other challenging males. A challenging bull may bellow or roar to get a female's attention, and the tending bull has to bellow or roar back. The most dominant bulls mate in
672-537: A habitat for endangered species , migratory birds , plants, and numerous other valuable animals, implemented the NWRS Improvement Act, acquired and protected key critical inholdings, and established leadership in habitat restoration and management. Under the act, the NWRS has created Comprehensive Conservation Plans (CCPs) for each refuge, developed through consultation with private and public stakeholders. These began
768-431: A new location to graze again. Sexually mature young bulls may try to start mating with cows by the age of two or three years, but if more mature bulls are present, they may not be able to compete until they reach five years of age. For the first two months of life, calves are lighter in color than mature bison. One extremely rare condition is the white buffalo , in which the calf turns entirely white. Bison are members of
864-460: A number of physical and behavioral differences. Adult American bison are slightly heavier on average because of their less rangy build and have shorter legs, which render them slightly shorter at the shoulder. American bison tend to graze more and browse less than their European relatives because their necks are set differently. Compared to the nose of the American bison, that of the European species
960-539: A practice of pleistocene rewilding ; wood bison are the most similar to the extinct steppe bison species ( Bison priscus ). The bison are adapting well to the cold climate, and Yakutia's Red List officially registered the species in 2019; a second herd was formed in 2020. In Pleistocene Park , there are also 24 plains bison as wood bison could not be acquired. Bison are migratory and herd migrations can be directional as well as altitudinal in some areas. Bison have usual daily movements between foraging sites during
1056-417: A predation episode varies, ranging from a few minutes to over nine hours. Bison display five apparent defense strategies in protecting calves from wolves: running to a cow; running to a herd; running to the nearest bull; running in the front or center of a stampeding herd; entering water bodies, such as lakes or rivers. When fleeing wolves in open areas, cows with young calves take the lead, while bulls take to
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#17328516503161152-449: A regional, integrated level adds to the effective conservation achievements of the FWS and allows individual refuges to respond more effectively to challenges. Wildlife and habitat management activities include: During fiscal year 2015, the refuge system manipulated 3.1 million acres of habitat (technique #10 from the preceding list) and managed 147 million acres of the system without habitat manipulation (using techniques #1 through 9 from
1248-424: A review process by stakeholders beginning in 2013. The CCPs must be consistent with the FWS goals for conservation and wildlife management. The CCPs outline conservation goals for each refuge for 15 years into the future, with the intent that they will be revised every 15 years thereafter. The comprehensive conservation planning process requires a scoping phase, in which each refuge holds public meetings to identify
1344-568: A single generic word covering both sexes. Thus: Such a distinction is not a general feature of the language (for example, Arapaho possesses gender-neutral terms for other large mammals such as elk, mule deer, etc.), and so presumably is due to the special significance of the bison in Plains Indian life and culture. A bison has a shaggy, long, dark-brown winter coat, and a lighter-weight, lighter-brown summer coat. Male bison are significantly larger and heavier than females. Plains bison are often in
1440-637: A threat to calves and sometimes old, injured, or sick adult bison, direct killing of non-calves is rare even when targeting lone and injured young individuals; attacking healthy bison is risky for bears, who can be killed instead. Bison are among the most dangerous animals encountered by visitors to the various North American national parks and will attack humans if provoked. They appear slow because of their lethargic movements but can easily outrun humans; bison have been observed running as fast as 65 to 70 km/h (40 to 45 mph). Bison may approach people for curiosity. Close encounters, including to touch
1536-648: A variety of different administrative and funding mechanisms. Setting aside the sections of Marine National Monuments outside refuge boundaries (685.7 million of the 759 million total acres in Marine National Monuments), leaves 151 million acres of the more traditional Refuges and Wetland Management Districts. These 151 million acres were acquired as follows: In addition to refuge status, the "special" status of lands within individual refuges may be recognized by additional designations, either legislatively or administratively. Special designation may also occur through
1632-467: Is a complex process of controlling or eradicating invasive species, using fire in a prescribed manner, assuring adequate water resources, and assessing external threats such as development or contamination. Hundreds of national refuges are home to some 700 species of birds, 220 species of mammals, 250 reptile and amphibian species, and more than 1000 species of fish. Endangered species are a priority of National Wildlife Refuges, with nearly 60 refuges having
1728-573: Is a system of protected areas of the United States managed by the United States Fish and Wildlife Service (FWS), an agency within the Department of the Interior . The National Wildlife Refuge System is the system of public lands and waters set aside to conserve America's fish, wildlife, and plants. Since President Theodore Roosevelt designated Florida's Pelican Island National Wildlife Refuge as
1824-418: Is also essential to proper management of refuge lands. As of September 30, 2019, the refuges had 15,257 roads, bridges, and trails; 5,204 buildings; 8,407 water management structures; and 8,414 other structures such as visitor facility enhancements (hunting blinds, fishing piers, boat docks, observation decks, and information kiosks). The overall facility infrastructure is valued at over $ 36 billion. The area of
1920-441: Is an ongoing, diverse effort to bring bison back from the brink of extinction. The 2020 Bison Conservation Initiative by the Department of the Interior has five central goals: wild, healthy bison herds; genetic conservation; shared stewardship; ecological restoration ; and cultural restoration. It strengthened mechanisms for delivery of bison to Native American tribes from federal herds. Excess bison from 2021 roundup were donated to
2016-451: Is classified by the United States government as a type of cattle, and the government allows private herds to be managed as such. This is a reflection of the characteristics that bison share with cattle. Though the American bison is a separate species and usually regarded as being in a separate genus from domestic cattle ( Bos taurus ), they have a lot of genetic compatibility with cattle. American bison can interbreed with cattle, although only
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#17328516503162112-401: Is completely unreliable as a means of determining what is a purebred bison and what is a crossbred cow. Many ranchers have deliberately crossbred their cattle with bison, and some natural hybridization could be expected in areas where cattle and bison occur in the same range. Since cattle and bison eat similar food and tolerate similar conditions, they have often been in the same range together in
2208-579: Is in every state. National Wildlife Refuge System employees are responsible for planning, biological monitoring and habitat conservation , contaminants management, visitor services, outreach and environmental education, heavy equipment operation, law enforcement, and fire management. The National Wildlife Refuge System deals with urban intrusion/development, habitat fragmentation , degradation of water quantity and quality, climate change , invasive species , increasing demands for recreation, and increasing demands for energy development. The system has provided
2304-755: Is not known if the Book Cliffs extension of the herd is also free of cattle hybridization. A separate study by Wilson and Strobeck, published in Genome , was done to define the relationships between different herds of bison in the United States and Canada, and to determine whether the bison at Wood Buffalo National Park in Canada and the Yellowstone Park bison herd were possibly separate subspecies. The Wood Buffalo Park bison were determined to actually be crossbreeds between plains and wood bison, but their predominant genetic makeup
2400-475: Is open or semiopen grasslands, as well as sagebrush, semiarid lands, and scrublands. Some lightly wooded areas are also known historically to have supported bison. Bison also graze in hilly or mountainous areas where the slopes are not steep. Though not particularly known as high-altitude animals, bison in the Yellowstone Park bison herd are frequently found at elevations above 2,400 m (8,000 ft), and
2496-462: Is set farther forward than the forehead when the neck is in a neutral position. The body of the American bison is hairier, though its tail has less hair than that of the European bison. The horns of the European bison point forward through the plane of its face, making it more adept at fighting through the interlocking of horns in the same manner as domestic cattle, unlike the American bison, which favors charging. American bison are more easily tamed than
2592-623: Is suggested to be the result of either incomplete lineage sorting or ancient introgression . Bison first appeared in Asia during the Early Pleistocene , around 2.6 million years ago. Bison only arrived in North America 195,000 to 135,000 years ago, during the late Middle Pleistocene , descending from the widespread Siberian steppe bison ( Bison priscus ), which had migrated through Beringia . Following their first appearance in North America,
2688-507: Is the national mammal of the United States . In American English, both buffalo and bison are considered correct terms for the American bison. However, in British English, the word buffalo is reserved for the African buffalo and water buffalo and not used for the bison. In English usage, the term buffalo was used to refer to the American mammal as early as 1625. The word bison
2784-558: The American buffalo , or simply buffalo (not to be confused with true buffalo ), is a species of bison that is endemic (or native) to North America . It is one of two extant species of bison, along with the European bison . Its historical range circa 9000 BC is referred to as the great bison belt , a tract of rich grassland spanning from Alaska south to the Gulf of Mexico , and east to
2880-637: The Atlantic Seaboard (nearly to the Atlantic tidewater in some areas), as far north as New York , south to Georgia , and according to some sources, further south to northern Florida , with sightings in North Carolina near Buffalo Ford on the Catawba River as late as 1750. Two subspecies or ecotypes have been described: the plains bison ( B. b. bison ), smaller and with a more rounded hump; and
2976-773: The Cumberland Gap through the Blue Ridge Mountains to upper Kentucky . A heavily used trace crossed the Ohio River at the Falls of the Ohio and ran west, crossing the Wabash River near Vincennes, Indiana . In Senator Thomas Hart Benton 's phrase saluting these sagacious path-makers, the bison paved the way for the railroads to the Pacific. The southern extent of the historic range of
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3072-854: The Henry Mountains bison herd is found on the plains around the Henry Mountains , Utah, as well as in mountain valleys of the Henry Mountains to an altitude of 3,000 m (10,000 ft). Reintroduced plains bison in Banff National Park have been observed to roam mountainous areas, including high ridges and steep drainages, and archaeological finds indicate that some bison historically may have spent their lives within mountains while others may have migrated in and out of mountains. Those in Yukon, Canada, typically summer in alpine plateaus above treeline. The first thoroughfares of North America, except for
3168-672: The Janos Biosphere Reserve in northern Chihuahua adding to the Mexican bison population. In 2020, the second herd was formed in Maderas del Carmen . A private reserve named Jagüey de Ferniza has kept bisons since before the above-mentioned reintroductions in Coahuila. Since 2006, an outherd of wood bison sent from Alberta's Elk Island National Park was established in Yakutia , Russia as
3264-521: The Wolakota Buffalo Range and for the first time Indigenous peoples joined refuge staff for the roundup. Six yearling female bison were also transferred from the Refuge to Theodore Roosevelt National Park , where National Park Service experts will study the extent to which translocated animals integrate into established herds. The refuge's Visitor Center opened on May 21, 2011. About two-thirds of
3360-422: The wood bison ( B. b. athabascae ), the larger of the two and having a taller, square hump. Furthermore, the plains bison has been suggested to consist of a northern plains ( B. b. montanae ) and a southern plains ( B. b. bison ) subspecies, bringing the total to three. However, this is generally not supported. The wood bison is one of the largest wild species of extant bovid in the world, surpassed only by
3456-585: The 1870s, which caused the plains bison population to undergo a population bottleneck . The bottleneck resulted in a founding population of around 100 individuals, split into six herds, five of which were managed by private ranchers and one managed by the New York Zoological Park (now the Bronx Zoo ). Additionally, a wild herd consisting of 25 individuals in Yellowstone National Park survived
3552-570: The 1980s to produce pesticides. The RMA was closed in 1985, and in 1987 environmental testing revealed that the site was extremely polluted. The RMA was listed on the National Priorities List , a list of hazardous waste sites in the United States eligible for long-term remedial action (cleanup) financed under the federal Superfund program run by the Environmental Protection Agency . In 1986, while environmental testing
3648-438: The 2020 Bison Conservation Initiative on May 7, 2020. This initiative focuses on maintaining the genetic diversity of the metapopulation rather than individual herds. Small populations of bison are at considerably larger risk due to their decreased gene pool and are susceptible to catastrophic events more so than larger herds. The 2020 Bison Conservation Initiative aims to translocate up to three bison every five to ten years between
3744-478: The American bison includes northern Mexico and adjoining areas in the United States as documented by archeological records and historical accounts from Mexican archives from 700 CE to the 19th century. The Janos-Hidalgo bison herd has ranged between Chihuahua, Mexico, and New Mexico, United States, since at least the 1920s. The persistence of this herd suggests that habitat for bison is suitable in northern Mexico. In 2009, genetically pure bison were reintroduced to
3840-465: The Asian gaur . Among extant land animals in North America, the bison is the heaviest and the longest, and the second tallest after the moose . Once roaming in vast herds , the species nearly became extinct by a combination of commercial hunting and slaughter in the 19th century and introduction of bovine diseases from domestic cattle. With an estimated population of 60 million in the late 18th century,
3936-483: The Department of the Interior's herds. Specific smaller herds will require a more intense management plan. Translocated bison will also be screened for any health defects such as infection of brucellosis bacteria as to not put the larger herd at risk. Bison went from numbering an estimated 60 million individuals before the 1870s to becoming nearly extinct in the 1880s. This was due to the mass slaughtering of bison during
Rocky Mountain Arsenal National Wildlife Refuge - Misplaced Pages Continue
4032-605: The European and breed more readily with domestic cattle. During the population bottleneck, after the great slaughter of American bison during the 19th century, the number of bison remaining alive in North America declined to as low as 541. During that period, a handful of ranchers gathered remnants of the existing herds to save the species from extinction. These ranchers bred some of the bison with cattle in an effort to produce "cattalo" or " beefalo ". Accidental crossings were also known to occur. Generally, male domestic bulls were crossed with bison cows, producing offspring of which only
4128-644: The National Wildlife Refuge Association and referenced below. Comprehensive wildlife and habitat management demands the integration of scientific information from several disciplines, including understanding ecological processes and monitoring status of fish, wildlife and plants. Equally important is an intimate understanding of the social and economic drivers that impact and are affected by management decisions and can facilitate or impede implementation success. Service strategic habitat conservation planning, design, and delivery efforts are affected by
4224-573: The RMA was to be managed as a wildlife refuge in the interim. At the time the refuge was established, the RMA consisted of more than 17,000 acres (69 km) of grassland dotted with small manmade lakes and ponds. Not all of this land was set aside for the refuge. Section 2(c)(2) of the enabling legislation set aside 12.08 acres (0.0489 km) for use as the South Adams County Water Treatment Plant and 63.04 acres (0.2551 km) for
4320-555: The Rocky Mountain Arsenal National Wildlife Refuge Act on September 25, 1992, and the legislation was signed into law by President George H. W. Bush on October 9. The law stipulated that a majority of the RMA site would become a national wildlife refuge under the jurisdiction of the Fish and Wildlife Service once the environmental restoration is completed. The Act also provided that, to the extent possible,
4416-548: The United States for the benefit of the present and future generations of Americans" (National Wildlife Refuge System Improvement Act of 1997). The system maintains the biological integrity, diversity, and environmental health of these natural resources and enables for associated public enjoyment of these areas where compatible with conservation efforts. National Wildlife Refuges manage a range of habitat types, including wetlands, prairies, coastal and marine areas, and temperate, tundra, and boreal forests. The management of each habitat
4512-746: The Yellowstone Park bison herd, the Henry Mountains bison herd, which was started with bison taken from Yellowstone Park, the Wind Cave bison herd, and the Wood Buffalo National Park bison herd and subsidiary herds started from it, in Canada. A landmark study of bison genetics performed by James Derr of Texas A&M University corroborated this. The Derr study was undertaken in an attempt to determine what genetic problems bison might face as they repopulate former areas, and it noted that bison seem to be adapting successfully, despite their apparent genetic bottleneck. One possible explanation for this might be
4608-435: The actions of other legitimate agencies or organizations. The influence that special designations may have on the management of refuge lands and waters may vary considerably. Special designation areas within the refuge system as of September 30, 2014, included: American bison B. b. athabascae (wood bison) B. b. bison (plains bison) The American bison ( Bison bison ; pl. : bison ), commonly known as
4704-480: The animals, can be dangerous, and gunshots do not startle them. Between 1980 and 1999, more than three times as many people in Yellowstone National Park were injured by bison than by bears. During this period, bison charged and injured 79 people, with injuries ranging from goring puncture wounds and broken bones to bruises and abrasions. Bears injured 24 people during the same time. Three people died from
4800-400: The bison rapidly differentiated into new species , such as the largest of all bison, the long-horned Bison latifrons , along with Bison antiquus . The first appearance of bison in North America is considered to define the regional Rancholabrean faunal stage, due to its major impact on the ecology of the continent. Modern American bison are thought to have evolved from B. antiquus at
4896-524: The case of males, it is unlikely to be related to dominance , but rather to social bonding or gaining sexual experience. Bison mate in late spring and summer in more open plain areas. During fall and winter, bison tend to gather in more wooded areas. During this time, bison partake in horning behaviors. They rub their horns against trees, young saplings, and even utility poles. Aromatic trees like cedars and pine seem to be preferred. Horning appears to be associated with insect defense, as it occurs most often in
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#17328516503164992-607: The demographic, societal, and cultural changes of population growth and urbanization, as well as people's attitudes and values toward wildlife. Consideration of these factors contributes to the success of the service's mission to protect wildlife and their habitats. The refuge system works collaboratively internally and externally to leverage resources and achieve effective conservation. It works with other federal agencies, state fish and wildlife agencies, tribes, nongovernmental organizations, local landowners, community volunteers, and other partners. Meaningful engagement with stakeholders at
5088-630: The end of the Late Pleistocene - beginning of the Holocene , with likely intermediates between the species referred to as Bison "occidentalis" . The North American bison population experienced demographic stability during the Middle Holocene but began a slow decline in the Late Holocene beginning about 2,700 BP. Although they are superficially similar, the American and European bison exhibit
5184-596: The end of their first year. At three years of age, bison cows are mature enough to produce a calf. The birthing period for bison in boreal biomes is protracted compared to that of other northern ungulates, such as moose and caribou. Bison have a life expectancy around 15 years in the wild and up to 25 years in captivity. However, males and females from a hunted population also subject to wolf predation in northern Canada have been reported to live to 22 and 25 years of age, respectively. Bison have been observed to display homosexual behaviors , males much more so than females. In
5280-1223: The fall when the insect population is at its highest. Cedar and pines emit an aroma after bison horn them and this seems to be used as a deterrent for insects. A bison wallow is a shallow depression in the soil, which bison use either wet or dry. Bison roll in these depressions, covering themselves with dust or mud. Past and current hypotheses to explain the purpose of wallowing include grooming associated with shedding, male-male interaction (typically rutting ), social behavior for group cohesion, play, relief from skin irritation due to biting insects, reduction of ectoparasite ( tick and lice ) load, and thermoregulation . Bison wallowing has important ecosystem engineering effects and enhances plant and animal diversity on prairies. While often secure from predation because of their size and strength, in some areas, vulnerable individuals are regularly preyed upon by wolves . Wolf predation typically peaks in late winter, when elk migrates south and bison are distressed with heavy snows and shortages of food sources, with attacks usually being concentrated on weakened and injured cows and calves. Wolves more actively target herds with calves than those without. The length of
5376-472: The female offspring are fertile in the first generation. These female hybrids can be bred back to either bison or domestic bulls, resulting in either 1/4 or 3/4 bison young. Female offspring from this cross are also fertile, but males are not reliably fertile unless they are either 7 ⁄ 8 bison or 7 ⁄ 8 domestic. Moreover, when they do interbreed, crossbreed animals in the first generation tend to look very much like purebred bison, so appearance
5472-509: The females were fertile. The crossbred animals did not demonstrate any form of hybrid vigor , so the practice was abandoned. The proportion of cattle DNA that has been measured in introgressed individuals and bison herds today is typically quite low, ranging from 0.56 to 1.8%. In the United States , many ranchers are now using DNA testing to cull the residual cattle genetics from their bison herds. The U.S. National Bison Association has adopted
5568-500: The first 2–3 weeks of the season. More subordinate bulls mate with any remaining estrous cow that has not mated yet. Male bison play no part in raising the young. Bison herds have dominance hierarchies that exist for both males and females. A bison's dominance is related to its birth date. Bison born earlier in the breeding season are more likely to be larger and more dominant as adults. Thus, bison are able to pass on their dominance to their offspring as dominant bison breed earlier in
5664-414: The first wildlife refuge in 1903, the system has grown to over 568 national wildlife refuges and 38 wetland management districts encompassing about 859,000,000 acres (3,476,200 km ). The mission of the refuge system is "To administer a national network of lands and waters for the conservation, management, and where appropriate, restoration of fish, wildlife, and plant resources and their habitats within
5760-404: The former was limited after the rediscovery of a relatively pure herd. Elk Island National Park, which has wild populations of both wood and plains bison, has recorded maximum weights for bull bison of 1186 kg (plains) and 1099 kg (wood), but noted that 3/4 of all bison over 1000 kg were wood bison. When raised in captivity and farmed for meat, the bison can grow unnaturally heavy and
5856-472: The greater law enforcement community in cooperative efforts to combat the nation's drug problems, address border security issues, and aid in other security challenges. Prevention and control of wildland fires is also a part of refuge management. Completion of controlled burns to reduce fuel loading, and participation in the interagency wildland fire suppression efforts, are vital for management of refuge lands. A considerable infrastructure of physical structures
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#17328516503165952-415: The injuries inflicted—one person by bison in 1983, and two people by bears in 1984 and 1986. A major problem that bison face today is a lack of genetic diversity due to the population bottleneck the species experienced during its near-extinction event. Another genetic issue is the entry of genes from domestic cattle into the bison population, through hybridization. Officially, the "American buffalo"
6048-586: The largest semidomestic bison weighed 1,724 kg (3,801 lb). The heads and forequarters are massive, and both sexes have short, curved horns that can grow up to 60 cm (2 ft) long with 90 cm (3 ft) to 124 cm (4 ft) width, which they use in fighting for status within the herd and for defense. Bison are herbivores , grazing on the grasses and sedges of the North American prairies . Their daily schedule involves two-hour periods of grazing, resting, and cud chewing, then moving to
6144-410: The lowest weights probably representing typical weight around the age of sexual maturity at 2 to 3 years of age. The heaviest wild bull for B.b.bison ever recorded weighed 1,270 kg (2,800 lb) while there had been bulls estimated to be 1,400 kg (3,000 lb). B.b.athabascae is significantly larger and heavier on average than B.b.bison while the number of recorded samples for
6240-695: The old RMA was included in the remediation effort. On January 21, 2003, the Environmental Protection Agency (EPA) certified 940 acres (3.8 km) as ready for use, and this acreage was turned over to the USFWS. Another 5,053 acres (20.45 km) were certified clean on January 15, 2004. This allowed USWFS to formally open the Rocky Mountain Arsenal National Wildlife Refuge on April 2, 2004. At that time, walking trails gave guests access to about 2,000 acres (8.1 km) of
6336-810: The past, and opportunity for crossbreeding may sometimes have been common. In recent decades, tests were developed to determine the source of mitochondrial DNA in cattle and bison, and most private "buffalo" herds were actually crossbred with cattle, and even most state and federal buffalo herds had some cattle DNA. With the advent of nuclear microsatellite DNA testing, the number of herds known to contain cattle genes has increased. As of 2011, though about 500,000 bison existed on private ranches and in public herds, perhaps only 15,000 to 25,000 of these bison were pure and not actually bison-cattle hybrids. DNA from domestic cattle ( Bos taurus ) has been found in almost all examined bison herds. Significant public bison herds that do not appear to have hybridized domestic cattle genes are
6432-449: The plan, the refuge is available for public use, and community outreach and educational programs will be implemented to encourage public use. A record 950,000 people visited the refuge in 2023. Refuge officials say they expect visitation to top one million annually once visitor facilities, outreach plans, and a wildlife management plan are completely in place. National Wildlife Refuge The National Wildlife Refuge System ( NWRS )
6528-451: The population was primarily found in a few national parks and reserves. Through multiple reintroductions , the species now freely roams wild in several regions in the United States , Canada and Mexico . The American bison has also been introduced to Yakutia in Russia . Spanning back millennia , Native American tribes have had cultural and spiritual connections to the American bison. It
6624-454: The preceding list). Refuges attract about 65 million visitors each year who come to hunt, fish, observe, and photograph wildlife, and are a significant boon to local economies. According to the FWS's 2013 Banking on Nature Report , visitors to refuges positively impact the local economies. The report details that 47 million people who visited refuges that year: The refuge system has a professional cadre of law enforcement officers that supports
6720-785: The primary purpose of conserving in aggregate 280 threatened or endangered species. The National Wildlife Refuge System welcomes about 65 million visitors each year to participate in outdoor recreational activities. The system manages six wildlife-dependent recreational uses in accordance with the National Wildlife Refuge System Improvement Act of 1997, including hunting , fishing , birding , photography , environmental education , and environmental interpretation. Hunters visit more than 350 hunting programs on refuges and on about 36,000 waterfowl production areas. Opportunities for fresh or saltwater fishing are available at more than 340 refuges. At least one wildlife refuge
6816-595: The public's main concerns; plan formulation, when refuge staff and FWS planners identify the key issues and refuge goals; writing the draft plan, in which wildlife and habitat alternatives are developed, and the plan is submitted for public review; revision of the draft plan, which takes into consideration the public's input; and plan implementation. Each CCP is required to comply with the National Environmental Policy Act (NEPA) and must consider potential alternatives for habitat and wildlife management on
6912-424: The rear of the herds to guard the cows' escape. Bison typically ignore wolves not displaying hunting behavior. Wolf packs specializing in bison tend to have more males because their larger size than females allows them to wrestle prey to the ground more effectively. Healthy, mature bulls in herds rarely fall prey. Grizzly bears are known to feed on carcass and may steal wolves' kills. While grizzlies can also pose
7008-409: The refuge consists of mixed-grass and shortgrass prairie , while the remainder is a mix of forest, shrubland , and lakes, streams, and riparian areas. A large number of man-made features dot the landscape, including irrigation ditches , lakes and ponds, and former homesteads . Beginning in 2011, the USFWS began implementing a plan to remove invasive plant species and restore native plants on most of
7104-540: The refuge in March 2007 as part of the USFWS Pilot Bison Project. The number of bison reached 87 in 2013, forcing the USFWS to reduce the herd to just 60 animals as the limited acreage could not support so many animals. USFWS officials said that in a few years they would expand the bison acreage to 12,000 acres (49 km), which would allow the herd to expand to an anticipated 210 animals. The conservation of bison
7200-439: The refuge system is heavily influenced by large areas devoted to protecting wild Alaska and to protecting marine habitats in the Pacific and Atlantic Oceans; however, the number of units and public visitation overwhelmingly occurs in the lower 48 states, though these refuges and wetland management districts constitute only about 2% of the area of the system. Today's Refuge System (September 30, 2022 data) has been assembled through
7296-566: The refuge, and buses allowed visitors to tour another 3,000 acres (12 km). EPA released another 7,399 acres (29.94 km) on July 31, 2006. The remaining 2,596 acres (10.51 km) were declared contaminant-free and turned over to the refuge on October 15, 2010. The total cost of the cleanup was $ 2.1 billion. Sixteen American bison were brought from the National Bison Range in Montana to an enclosed 1,400-acre (5.7 km) section of
7392-543: The refuge, and identify their possible effects on the refuge. The NEPA requires FWS planners and refuge staff to engage the public in this planning process to assist them with identifying the most appropriate alternative. Completed CCPs are available to the public and can be found on the FWS website. A partial history of the Refuge System is at . For a much more thorough and complete history, see "The History and Future of our National Wildlife Refuge System" compiled by
7488-501: The refuge. As of 2013, the USFWS had identified 332 species of wildlife on the refuge. Most of these species exist only in very low numbers. All land included in the Rocky Mountain Arsenal National Wildlife Refuge was turned over to the Department of the Interior with management of the refuge being the responsibility of both the USFWS and the U.S. Army. Some land may still contain chemical weapons devices (such as unexploded projectiles or buried equipment) and cannot safely be integrated into
7584-473: The remaining 250 acres (1.0 km) of the Shell site, 100 acres (0.40 km) are (as of 2013) being used for a water treatment facility and another 150 acres (0.61 km) for domestic livestock grazing. The USFWS anticipates selling these 250 acres (1.0 km) by 2023. These land set-asides, sales, and transfers left the refuge with 15,988 acres (64.70 km) of land. The entire 17,000 acres (69 km) of
7680-482: The same Greek word boubalos we also get the Bubal hartebeest . Bison was borrowed from French bison in the early 17th century, from Latin bison ( aurochs ), from a Proto-Germanic word similar to wisent and, per Etymonline, first applied to American buffalo in the 1690s. In Plains Indian languages in general, male and female bison are distinguished, with each having a different designation rather than there being
7776-455: The season. In addition to dominance, the older bison of a generation also have a higher fertility rate than the younger ones. Bison mate in August and September; gestation is 285 days. A single reddish-brown calf nurses until the next calf is born. If the cow is not pregnant, a calf will nurse for 18 months. Cows nurse their calves for at least 7 or 8 months, but most calves seem to be weaned before
7872-487: The small amount of domestic cattle genes that are now in most bison populations, though this is not the only possible explanation for bison success. In the study, cattle genes were also found in small amounts throughout most national, state, and private herds. "The hybridization experiments conducted by some of the owners of the five foundation herds of the late 1800s, have left a legacy of a small amount of cattle genetics in many of our existing bison herds," said Derr. "All of
7968-534: The small size of only 12 individuals in the founder population. A side finding of this was that the Antelope Island bison herd appears to be most closely related to the Wood Buffalo National Park bison herd, though the Antelope Island bison are actually plains bison. In order to bolster the genetic diversity of the American bison, the National Park Service alongside the Department of the Interior announced
8064-849: The smaller range of sizes, and wood bison in the larger range. Head-rump lengths at maximum up to 3.5 m (11 ft 6 in) for males and 2.85 m (9 ft 4 in) for females long and the tail adding 30 to 95 cm (1 ft 0 in to 3 ft 1 in). Heights at withers in the species can reach up to 186 to 201 cm (6 ft 1 in to 6 ft 7 in) for B. b. bison and B. b. athabascae respectively. Typically weights can range from 318 to 1,179 kg (701 to 2,599 lb), 460 to 988 kg (1,014 to 2,178 lb) with medians of 730 to 792.5 kg (1,609 to 1,747 lb) ( B.b. bison ) and 943.6 kg (2,080 lb) ( B.b.athabascae ) in males, and 360 to 640 kg (790 to 1,410 lb) with medians of 450 to 497.6 kg (992 to 1,097 lb) in females, although
8160-463: The species was culled down to just 541 animals by 1889 as part of the subjugation of the Native Americans, because the American bison was a major resource for their traditional way of life (food source, hides for clothing and shelter, and horns and bones for tools). Recovery efforts expanded in the mid-20th century, with a resurgence to roughly 31,000 wild bison as of March 2019. For many years,
8256-562: The state owned bison herds tested (except for possibly one) contain animals with domestic cattle mtDNA." It appears that the one state herd that had no cattle genes was the Henry Mountains bison herd; the Henry Mountain herd was started initially with transplanted animals from Yellowstone Park. However, the extension of this herd into the Book Cliffs of central Utah involved mixing the founders with additional bison from another source, so it
8352-722: The summer. In the Hayden Valley, Wyoming, bison have been recorded traveling, on average, 3 km (2 mi) per day. The summer ranges of bison appear to be influenced by seasonal vegetation changes, interspersion and size of foraging sites, the rut , and the number of biting insects. The size of preserve and availability of water may also be a factor. Bison are largely grazers, eating primarily grasses and sedges. On shortgrass pasture, bison predominately consume warm-season grasses. On mixed prairie, cool-season grasses, including some sedges, apparently compose 79–96% of their diet. In montane and northern areas, sedges are selected throughout
8448-684: The time-obliterated paths of mastodon or muskox and the routes of the mound builders , were the traces made by bison and deer in seasonal migration and between feeding grounds and salt licks . Many of these routes, hammered by countless hoofs instinctively following watersheds and the crests of ridges in avoidance of lower places' summer muck and winter snowdrifts, were followed by the aboriginal North Americans as courses to hunting grounds and as warriors' paths. They were invaluable to explorers and were adopted by pioneers . Bison traces were characteristically north and south, but several key east–west trails were used later as railways. Some of these include
8544-445: The tribe Bovini . Genetic evidence from nuclear DNA indicates that the closest living relatives of bison are yaks , with bison being nested within the genus Bos , rendering Bos without including bison paraphyletic . While nuclear DNA indicates that the two living bison species are each other's closest living relatives, the mitochondrial DNA of European bison is more closely related to that of domestic cattle and aurochs , which
8640-497: The wildlife refuge, so the Fish & Wildlife Service manages 14,904 acres (60.31 km) of land. The remainder of the property (1,084 acres (4.39 km)) is managed by the U.S. Army. The USFWS and Army signed an inter-agency agreement to cooperate in the management of the Army land according to UWFWS principles. A Comprehensive Management Plan for the refuge was finalized in June 1996. Under
8736-441: The year. Bison also drink water or consume snow on a daily basis. Female bison live in maternal herds which include other females and their offspring. Male offspring leave their maternal herd when around three years old and either live alone or join other males in bachelor herds. Male and female herds usually do not mingle until the breeding season, which can occur from July through September. However, female herds may also contain
8832-644: Was applied in the 1690s. Buffalo was applied to the American bison by Samuel de Champlain as the French word buffles in 1616 (published 1619), after seeing skins and a drawing. These were shown to him by members of the Nipissing First Nation , who said they traveled forty days (from east of Lake Huron) to trade with another nation who hunted the animals. Buffel in turn comes from Portuguese bufalo (water buffalo), which comes from Latin bufalus (an antelope, gazelle, or wild ox), from Greek boubalos . From
8928-461: Was built in 1942 to manufacture chemical weapons . A portion of the site was leased to private industry in 1946 for petroleum production and agricultural and industrial chemical manufacturing. When the American chemical weapons program was shut down after the Vietnam War , the RMA served as a site for dismantling and disposing of these weapons. The Shell Oil Company also used a portion of the site in
9024-468: Was continuing, a winter communal roost of bald eagles , then an endangered species , was discovered at the Rocky Mountain Arsenal. Additional investigation by the U.S. Fish and Wildlife Service (USFWS) discovered that the RMA was home more than 330 species of wildlife. With the arsenal not fit for human habitation, pressure quickly built to have it turned into a wildlife refuge. Congress enacted
9120-524: Was designated a national wildlife refuge in 1992 by the United States Congress , and underwent a costly environmental cleanup in order to remove pollutants. The refuge is managed by the United States Fish and Wildlife Service . More than 330 species of wildlife inhabit the refuge, including raptors , deer , raccoons , coyotes , white pelicans , black-footed ferrets , black-tailed prairie dogs , and bison . The Rocky Mountain Arsenal (RMA)
9216-457: Was that of the expected "wood buffalo". However, the Yellowstone Park bison herd was pure plains bison, and not any of the other previously suggested subspecies. Another finding was that the bison in the Antelope Island herd in Utah appeared to be more distantly related to other plains bison in general than any other plains bison group that was tested, though this might be due to genetic drift caused by
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