Gray Wolves in the Northern Rocky Mountains
Mountain-Prairie Region

Wyoming Gray Wolf Recovery Status Report

From:               USFWS Wyoming Wolf Recovery Project Leader, Jackson, WY

Subject:            Status of Gray Wolf Management in Wyoming and the NRM

WYOMING WOLF WEEKLY- Nov 30 through Dec 4, 2009

Web Address – USFWS reports (past weekly and annual reports) can be viewed at . Weekly reports for Montana and Idaho are produced by those States and can be viewed on the Montana Fish, Wildlife and Parks website ( and Idaho Department of Fish and Game website ( All weekly and annual reports are government property and can be used for any purpose.  Please distribute as you see fit.

Annual Reports
The Rocky Mountain Wolf Recovery 2008 Annual Report is available at: .
Delisting Litigation Status
A hearing on the preliminary injunction request was held in Federal Court in Missoula, MT on August 31. Oral arguments were heard from the plaintiffs, U.S. Department of Interior, Montana, and Idaho. On September 8, the Federal Court denied the preliminary injunction motion filed by Defenders of Wildlife and others to stop the 2009 regulated gray wolf hunts in Idaho and Montana.  However, in issuing his order, the judge indicated that his preliminary review of the overall delisting case raised questions about Service’s approach of conferring ESA protections to a “significant portion of the range” of a species, as opposed to designating the entire species as a threatened or endangered species. A hearing date for oral arguments has not been set, but is expected to be soon after legal briefs are completed in late January 2010. 

Official wolf population estimates for Wyoming will be published in the Annual Report. As of November 2009, preliminary estimates for Wyoming outside Yellowstone National Park (YNP) are >200 wolves in >30 packs (19-21 breeding pairs).  Inside YNP there are approximately 116 wolves in 14 packs (6 breeding pairs).

Idaho: Wolf hunting season is open in most parts of Idaho with a statewide quota of 220 wolves. As of 12/3/09, 113 wolves were legally harvested. The Idaho Fish and Game Commission extended the wolf hunting season until March 31 in units where quotas have not been reached. For the most current harvest status information, call 1(877)872-3190. The IDFG website that summarizes wolf hunting in Idaho can be viewed at  

Montana: Wolf hunting season closed in Montana with a total harvest of 72 wolves.  FWP’s website that tracks wolf hunting in Montana can be viewed at    

On 11/12/09, WY Wildlife Services confirmed 12 sheep were killed by a wolf on private property in the southern Big Horn Mountains. Control was completed on 12/2/09 when Wildlife Services killed an adult male wolf in the same vicinity of where the depredations occurred.

Based on preliminary reports through December 3, 2009, a total of 21 cattle, 195 sheep, and 7 dogs were recorded as confirmed wolf kills, and 30 wolves were killed in subsequent control actions in Wyoming. These depredations occurred in the following areas:

Location  # of Sheep Lost # of Wolves Killed in Control Actions
Rock Creek (N. of Pinedale)  37 sheep   6
Big Horn Mountains 113 sheep  3
Dog Creek (Snake River)  45 sheep  5
  195 sheep 14 wolves

Location   # of Cattle Lost # of Wolves Killed in Control Actions
Rock Creek (N. of Pinedale 1 yrlg steer 0
Upper Green River 7 cattle  4
Prospect Mtns./Sweetwater  1 calf 2
Daniel 1 calf 0
West of Cody 6 cattle 8
Deer Creek (Casper)   1 calf 0
Big Piney  1 calf 0
Dubois 3 cattle 2
  21 cattle 16 wolves

Table 1. Confirmed livestock depredations in WY: 1999 - 2009.

  1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
Cattle 2 3 18 23 34 75 54 123 55 41 21
Sheep 0 25 34 0 7 18 27 38 16 26 195
Dogs 6 6 2 0 0 2 1 1 2 0 7
Goats 0 0 0 0 10 0 0 0 0 0 0
Horses 0 0 0 2 0 1 0 1 0 0 0
Wolves Controlled 1 2 4 6 18 29 41 44 63 46 30


Nothing to report at this time.

Law Enforcement and Related Activities   
Nothing to report at this time.

Outreach and Education
An article describing Echinococcus granulosus in gray wolves and ungulates in Idaho and Montana was recently published the Journal of Wildlife Diseases.

Echinococcus granulosus in Gray Wolves and Ungulates in Idaho and
Montana, USA
William J. Foreyt,1,4 Mark L. Drew,2 Mark Atkinson,3 and Deborah McCauley3 1Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington 99164-7040, USA; 2Wildlife Health Laboratory, Idaho Department of Fish and Game, Caldwell, Idaho 83607, USA; 3Montana Department of Fish, Wildlife and Parks, 1400 S. 19th Avenue, Bozeman, Montana 59718, USA; 4Corresponding author (email:

We evaluated the small intestines of 123 gray wolves (Canis lupus) that were collected from Idaho, USA (n563), and Montana, USA (n560), between 2006 and 2008 for the tapeworm Echinococcus granulosus. The tapeworm was detected in 39 of 63 wolves (62%) in Idaho, USA, and 38 of 60 wolves (63%) in Montana, USA. The detection of thousands of tapeworms per wolf was a common finding. In Idaho, USA, hydatid cysts, the intermediate form of E. granulosus, were detected in elk (Cervus elaphus), mule deer (Odocoileus hemionus), and a mountain goat (Oreamnos americanus). In Montana, USA, hydatid cysts were detected in elk. To our knowledge, this is the first report of adult E. granulosus in Idaho, USA, or Montana, USA. It is unknown whether the parasite was introduced into Idaho, USA, and southwestern Montana, USA, with the importation of wolves from Alberta, Canada, or British Columbia, Canada, into Yellowstone National Park, Wyoming, USA, and central Idaho, USA, in 1995 and 1996, or whether the parasite has always been present in other carnivore hosts, and wolves became a new definitive host. Based on our results, the parasite is now well established in wolves in these states and is documented in elk, mule deer, and a mountain goat as intermediate hosts.

Further Information
To request an investigation of livestock injured or killed by wolves, please contact the U.S. Dept. of Agriculture Wildlife Services at (307)261-5336.

For additional information, please contact:
Ed Bangs (406)449-5225 x204 or Ed_Bangs@FWS.GOV

Mike Jimenez (307)733-7096 or (307)330-5631 or  Mike_Jimenez@FWS.GOV
Last updated: November 8, 2012