Western United States






Species and Location  

  • 1 Highway 39, UT
    1 Highway 39, UT

    Updated: 11-2-2014 Deer, moose, and antelope have exhibited malformations along Utah’s highway 39 from Ogden into Rich County on the Monte Cristo crest. These malformations include under bites, and testicular abnormalities.  These malformations have been...

    4 Hart Mountain, OR
    4 Hart Mountain, OR

    Pronghorn antelope at Hart Mountain National Antelope Refuge have been in decline since the early 1990s. These antelope have been shown to be selenium and copper deficient.  These deficiencies have marked wildlife declines for the...

  • 5 Bitterroot Valley, MT
    5 Bitterroot Valley, MT

    The Bitterroot Valley of Montana has been the site of a large number of wildlife malformations and declines since 1995. These have included moose, elk, bighorn sheep, white tailed deer, birds, and rodents. A study...

    6 Thompson Falls, MT
    6 Thompson Falls, MT

    Over 400 bighorn sheep have been hit by cars, and more than 50 have been hit by trains on Highway 200 near Thompson Falls MT. These sheep experienced a sharp decline in the late ’80s,...

    7 Provo Peak, UT
    7 Provo Peak, UT

    In 2007 bighorn sheep from Sula Montana were released in American fork Canyon. These sheep were brought in to supplement sheep that had been released in 2001 from Canada. In 2009 these sheep began to...

    8 South Central, WA
    8 South Central, WA

    Since the mid 1990s elk in South Central Washington around Cowlitz county have been experiencing hoof rot. These occurrences are accompanied by copper and selenium deficiencies, along with bacterial infections. More than half of the...

  • 9 Shasta County, CA
    9 Shasta County, CA

    In the mid 1980s blacktail deer in California’s Latour state forest were in decline. Investigations into the reasons for these declines suggested that selenium deficiencies were responsible for reduce fecundity.  A study was conducted with...

    10 Lander, WY
    10 Lander, WY

    In 2006 and 2010 large areas of Fremont and Natrona counties were sprayed with the insecticide Dimilin to control grasshoppers. Dimilin’s chemical name is Diflubenzuron, a Benzoylurea, it is in the sulfonylurea family of chemicals, like...

    11 Whiskey Mountain, WY
    11 Whiskey Mountain, WY

    During the winter of 1990/91 30% of the Whiskey mountain bighorn sheep herd was lost to a pneumonia outbreak. By 1997 the herd was half of what it had been. The geologist David Love reported...

    12 Elk, OR
    12 Elk, OR

    Elk in parts of Oregon have experienced hoof rot, like elk in Washington. These Oregon cases have occurred on and near timber harvests just like the cases in Washington.

  • 13 Hotchkiss, CO
    13 Hotchkiss, CO

    During the past 10 years, hunters and residents of the Hotchkiss and Crawford areas have reported a high number of so-called “cactus bucks.” In these male animals the antlers grow in odd shapes, never develop...

    14 Paunsaugunt, UT
    14 Paunsaugunt, UT

    Utah’s Paunsaugunt has been home to a lot of Mule deer “cactus bucks” with retained velvet, and misshaped antlers. The herd is currently in decline. The paunsaugunt plateau has been the site of some fairly...

    16 Sheldon, NV
    16 Sheldon, NV

    Sheldon National Wildlife Refuge in NV is managed under the same authority as Hart Mountain. Like Hart Mountain, Sheldon has sought to increase its use of herbicides. In a letter from the EPA in 2011,...

  • 17 Wild Cat Hills, NE
    17 Wild Cat Hills, NE

    In 2001 22 bighorn sheep were reintroduced into the Wild Cat Hills of Nebraska. In the fall of that year one sheep developed hoof deformities, as did several other sheep during subsequent years. These sheep...

  • 22 Moose, AK
    22 Moose, AK

    Alaska moose have experienced episodic declines, and shown mineral deficiencies in sub-populations, going back over 30 years. These declines have been marked by copper deficiencies and hoof deformities like are seen in WA elk, UT...

    23 Yellowstone National Park
    23 Yellowstone National Park

    Many Yellowstone Deer, elk, antelope, and bison have exhibited varying malformations from under bites to malformed genitalia since the 1990s. Some of these populations  have experienced declines in their long term populations as well. As...

    24 National Bison Range, MT
    24 National Bison Range, MT

    The National bison range refuge in Montana has been host to bighorn sheep, and bison with misaligned hemiscrota. Many ungulates including deer, elk, and bighorn sheep have also exhibited under bites at the refuge. The...

  • 25 Oquirrh Mountains, UT
    25 Oquirrh Mountains, UT

    Habitat improvements and fuel reduction programs have been carried out along the lower West slopes of the Oquirrh mountains in Utah since at least 2011. The herbicide Imazapic (Trade name Plateau) has been used across...

    26 Kodiak Island, AK
    26 Kodiak Island, AK

    Black tail deer on Alaska’s Kodiak island have shown high rates of cryptorchidism (undescended testicles) since at least the mid 1990s. These cases have been concentrated to the low lands at the South end of...

    27 Lolo Zone, ID
    27 Lolo Zone, ID

    While Rocky Mountain elk have thrived across most of the West, Lolo zone elk in Idaho have been declining for 20 years. This area is just over the mountain from Montana’s Bitterroot Valley, and Thompson...

    28 Hopland, CA
    28 Hopland, CA

    Between 1955 and 1973 4.1% of deer taken on the Hopland CA field station, had velvet covered antlers that were often misshapen with spurious points. “The owner of a ranch about 11km from the field...

  • 29 National Elk Refuge, WY
    29 National Elk Refuge, WY

    Hoof rot was unusually prevalent in elk on the State run Camp Creek-Horse Creek area South of the National Elk Refuge during the winter of 2013/14. Hoof rot has been seen in NE bighorns, and in...

    31 Hardware Ranch, UT
    31 Hardware Ranch, UT

    In April and May of 2014, several highways in Northern Utah were surveyed for road killed deer, in an effort to record malformations. Road side mineral licks were also noted when found. The highest rates...

Latest From Our Blog  

Our Mission

Our Mission

Mission statement: To support, further, and promote wildlife science. For the benefit of fish and wildlife, and to the benefactors...

Volunteer

Lorem ipsum dolor sit amet, phasellus ac quam integer tristique purus blandit. Imperdiet nonummy, quis risus. Sed metus magna ligula amet. Ante nunc mollis ut interdum, ridiculus arcu porta hendrerit praesent sapien. Amet molestie, sit eleifend, felis iaculis proin fringilla maecenas lacus, non porttitor iaculis mauris, sodales mi lectus.

Become A Member

Lorem ipsum dolor sit amet, phasellus ac quam integer tristique purus blandit. Imperdiet nonummy, quis risus. Sed metus magna ligula amet. Ante nunc mollis ut interdum, ridiculus arcu porta hendrerit praesent sapien. Amet molestie, sit eleifend, felis iaculis proin fringilla maecenas lacus, non porttitor iaculis mauris, sodales mi lectus.

Donate

Lorem ipsum dolor sit amet, phasellus ac quam integer tristique purus blandit. Imperdiet nonummy, quis risus. Sed metus magna ligula amet. Ante nunc mollis ut interdum, ridiculus arcu porta hendrerit praesent sapien. Amet molestie, sit eleifend, felis iaculis proin fringilla maecenas lacus, non porttitor iaculis mauris, sodales mi lectus.