2010 Known and Probable Grizzly Bear Mortalities in the Greater Yellowstone Ecosystem

Data are preliminary and subject to change. Release of information will be limited for mortalities under investigation. NOTE: Two mortalities on the 2010 list occurred during fall 2009 and are still under investigation.
CountUniqueSexAge classKnown Mortality DateLocationLoss
50201050UNKCOY9-Aug-10Trout Crk, YNPProbable, natural, collared female lost 1 COY between 7/4-9/16. Mortality date is approximated.
49201049FAdult5-Nov-10Donahue Crk, GNF-MTKnown, human-caused, self-defense by hunter, no evidence of young
48201048FAdult27-Oct-10Aldrich Crk, SNF-WYKnown, human-caused, hunting related self-defense, human injury, female was accompanied by 2 yearlings
47201047MAdult24-Oct-10Lodgepole Crk, SNF-WYKnown, human-caused, self-defense by hunter, hunter was unable to deter bear as it approached. Shot at close range.
46201046MSubadult23-Oct-10Wolf Crk, BTNF-MTKnown, human-caused, killed in self-defense by hunter, hunter used pepper spray initially, shot bear as it returned a second time.
45201045UNKCOY19-Oct-10Crandall Crk, SNF-WYProbable, human-caused, COY of female that was killed in self-defense during hunting related incident.
44201044FAdult19-Oct-10Crandall Crk, SNF-WYKnown, human-caused, killed in self-defense by hunter, bear followed hunter from elk carcass and approached to very close range on 2 occasions, was shot during second approach. Female was accompanied by 1 COY
43201043MAdult5-Jul-10Venus Crk, SNF-WYKnown, natural, old aged radio-collared bear died at very remote location, no evidence of human involvement
42201042FAdult17-Oct-10Green Crk, PR-WYKnown, human-caused, management removal for repeated property damages and food rewards
41201041MAdult11-Oct-10Yellowstone River, PR-MTKnown, human-caused, management removal for repeated food rewards by gaining entry to the Gardiner garbage collection site
40201040MSubadult11-Oct-10Mountain Crk, BTNF-WYKnown, human-caused, killed in outfitters camp
39201039MAdult7-Oct-10Mountain Crk, BTNF-WYKnown, human-caused, killed in outfitters camp
38201038FAdult7-Oct-10Jim Crk, SNF-WYKnown, human-caused, killed in self-defense by hunters, human injuries, female was accompanied by a yearling
37201037MAdult5-Oct-10West Yellowstone, PR-MTKnown, human-caused, management removal for repeated food rewards and nuisance activity in the town of West Yellowstone. Bear was also in poor condition
36201036UNKCOY2-Oct-10Lamar River, YNPKnown, natural, wolves observed feeding on a COY grizzly by YNP wolf researchers, investigation of the site revealed only hair, no other remains
35201035MAdult4-Oct-10Sheridan Crk, SNF-WYKnown, human-caused, killed in self-defense by elk hunter.
34201034MAdult29-Sep-10South Fork Shoshone River, PR-WYKnown, human-caused, management removal for property damage and obtaining food rewards
33201033MAdult22-Sep-10Cub Crk, BTNF-WYKnown, human-caused, malicious killing
32201032FAdult24-Sep-10Diamond Crk, PR-WYKnown, human-caused, management removal for numerous property damages and food rewards in residential area
31201031FAdult20-Sep-10Dry Crk, PR-MTKnown, human-caused, management removal for cattle depredation and aggressive behavior
30201030MAdult10-Sep-10Bruin Crk, BTNF-WYKnown, human-caused, hunting related, self-defense at hunter killed elk carcass, one of 2 bears killed at this site on the same day.
29201029MAdult10-Sep-10Bruin Crk, BTNF-WYKnown, human-caused, hunting related, self-defense at hunter killed elk carcass, one of 2 bears killed at this site on the same day.
28201028MAdult7-Sep-10Horse Crk, BTNF-WYKnown, human-caused, killed in self-defense by guide hunting moose with client.
27201027MAdult7-Sep-10Kinky Crk, BTNF-WYKnown, human-caused, management removal for repeated livestock depredations
26201026MSubadult4-Sep-10Crow Crk, WRIR-WYKnown, human-caused, killed in self-defense at residence.
25201025MAdult13-Oct-09Arrow Crk, SNF-WYKnown, undetermined cause, collar of radioed bear went on mortality between 10/6-21/2009, was determined to be a dead bear in September 2010, date is midpoint between last active date and date of first mortality signal
24201024MAdult29-Aug-10Badger Crk, PR-WYKnown, human-caused, management removal for repeated livestock depredations
23201023FSubadult19-Aug-10Brooks Lake, SNF-WYKnown, human-caused, live removal for numerous food rewards and property damage
22201022MAdult15-Aug-10Yellowstone River, YNPKnown, undetermined cause, found dead 50 m from highway near LeHardy Rapids, no indications of vehicle impact, wound in abdomen suggests it may have been gored by bison
21201021MAdult15-Aug-10East Fork Wind River, PR-WYKnown, human-caused, management removal for repeated sheep depredations
20201020MAdult14-Aug-10Fish Crk, BTNF-WYKnown, human-caused, shot at close range in self-defense near wolf killed domestic calf carcass.
19201019MAdult5-Aug-10Sheridan Crk, SNF-WYKnown, human-caused, management removal for cattle depredation
18201018FAdult3-Aug-10Sheridan Crk, SNF-WYKnown, human-caused, management removal for repeated cattle depredations, 2 yearlings accompanying female were relocated
17201017MYearling30-Jul-10Soda Butte Crk, GNF-MTKnown, human-caused, live removal of yearling associated with human fatality and 2 other human injuries
16201016FYearling29-Jul-10Soda Butte Crk, GNF-MTKnown, human-caused, live removal of yearling associated with human fatality and 2 other human injuries
15201015FYearling29-Jul-10Soda Butte Crk, GNF-MTKnown, human-caused, live removal of yearling associated with human fatality and 2 other human injuries
14201014FAdult28-Jul-10Soda Butte Crk, GNF-MTKnown, human-caused, management removal for human fatality and 2 other human injuries. Female was accompanied by 3 yearlings
13201013MSubadult13-Jul-10Crooked Crk, PR-WYKnown, human-caused, management removal for numerous food rewards and aggressive behavior towards people.
12201012MCOY10-Jul-10South Fork Shoshone River, PR-WYKnown, human-caused, live removal of lone COY that was frequenting vicinity of ranch buildings
11201011FAdult24-Jun-10Whiskey Crk, SNFProbable, human-caused, collar found under suspicious circumstances. Likely killed between 6/18 and 6/30.
10201010FAdult8-Nov-09West Fork Dry Crk, WRIR-WYKnown, undetermined cause, collar went on mortality between 11/4-11/13 2009. Was determined to be a dead in July 2010. No evidence as to cause of death was found
9201009MSubadult2-Jul-10Solfatara Crk, YNPKnown, human-caused, live removal for repeated nuisance activity, property damage, and bold behavior in campground
8201008MAdult19-Jun-10Kitty Crk, SNF, WYKnown, human-caused, management removal for human fatality.
7201007MYearling18-Jun-10Iron Springs Crk, YNPKnown, human-caused, accidental death during management capture operation. Bear had lost an eye and had numerous infected injuries inflicted by another predator and was in very poor condition.
6201006FAdult12-Jun-10Elkhorn Crk, GNF-MTKnown, human-caused, mistaken identity by black bear hunter
5201005FAdult7-Jun-10Blacktail Crk, YNPKnown, natural, likely predation by wolves, extremely poor condition and old age were likely contributing factors.
4201004MYearling7-Jun-10Gallatin River, YNPKnown, human-caused, road kill
3201003MSubadult2-Jun-10Spread Crk, GTNPKnown, human-caused, road kill
2201002MAdult23-May-10Big Crk, PR-WYKnown, human-caused, management removal for property damage and livestock depredation
1201001MAdult13-May-10Grass Crk, State-WYKnown, human-caused, mistaken identity kill by black bear hunter
Known mortality - a carcass is in hand; Probable mortality - evidence strongly suggests a mortality has occurred but no carcass is recovered. Abbreviations: BOR = Bureau of Reclamation; BLM = Bureau of Land Management; BTNF = Bridger-Teton National Forest; COY = cub-of-the-year; CTNF = Caribou-Targhee National Forest; GNF = Gallatin National Forest; GTNP = Grand Teton National Park; IDFG = Idaho Fish and Game; MTFWP = Montana Fish, Wildlife and Parks; PR = private; SNF = Shoshone National Forest; UNK = Unknown; WRIR = Wind River Indian Reservation; WYGF = Wyoming Game and Fish; YNP = Yellowstone National Park.