2011 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.

Count Unique Sex Age class Known Mortality Date Location Loss
42 201142 M Adult 11 Nov 2011 South Fork Shoshone, State-WY Known, human-caused, management removal after hunter was injured in state park, bear was old, had poor teeth, and was in poor condition for Nov
41 201141 F Adult 6 Nov 2011 Wind River, PR-WY Known, human-caused, management removal for obtaining multiple food rewards in the town of Dubois, WY
40 201140 F Adult 30 Oct 2011 South Fork Shoshone, PR-WY Known, human-caused, management removal for repeated nuisance activity and obtaining food rewards in a residential area
39 201139 2011 WY Known, human-caused, under investigation
38 201138 F Adult Aug 2011 Lynx Crk, YNP Known, undetermined cause, remains found by YNP staff, estimated time of death was August, DNA results indicated this was a female bear
37 201137 M Adult 21 Oct 2011 Box Crk, BTNF-WY Known, human-caused, management removal for repeated property damage and food rewards
36 201136 M Adult 17 Oct 2011 Pine Crk, PR-MT Known, human-caused, management removal for sheep depredation
35 201135 F Adult 11 Oct 2011 Lamar River, YNP Known, natural, was likely killed by another bear
34 201134 2011 WY Known, human-caused, under investigation
33 201133 M Adult Oct 2011 PR-MT Under investigation
32 201132 M COY 29 Sep 2011 Sour Crk, YNP Known, human-caused, live mangement removal. COY of mother involved in 1 human fatality and known to be at the site of a second
31 201131 M COY 29 Sep 2011 Sour Crk, YNP Known, human-caused, live mangement removal. COY of mother involved in 1 human fatality and known to be at the site of a second
30 201130 F Adult 29 Sep 2011 Sour Crk, YNP Known, human-caused, management removal of female with 2 COY. Bear was known to have caused the death of a hiker on 6 July in a defensive reaction to a surprise encounter. Bear was also known to be present (from DNA) at the site of a second human fatality on 25 August.
29 201129 2011 ID Known, under investigation
28 201128 M Adult 20 Sep 2011 Wind River, SNF-WY Known, human-caused, management removal for repeated cattle depredation
27 201127 F Adult Spr/Sum 2010 Cabin Crk, YNP Known, Undetermined cause, based on remains bear appeared to have died during the spring or early summer of 2010. DNA results indicated this was a female bear
26 201126 F Adult 2011 BTNF-WY Known, human-caused, under investigation
25 201125 M Adult 11 Sep 2011 Sunlight Crk, PR-WY Known, human-caused, management removal for livestock depredation and management history of property damage
24 201124 UNK COY 2011 SNF-WY Probable, human-caused, under investigation
23 201123 UNK COY 2011 SNF-WY Probable, human-caused, under investigation
22 201122 UNK COY 2011 SNF-WY Probable, human-caused, under investigation
21 201121 F Adult 2011 SNF-WY Known, human-caused, under investigation
20 201120 F Adult 2011 SNF-WY Known, human-caused, under investigation
19 201119 M Adult 9 Sep 2011 Bear Crk, PR-MT Known, human-caused, management removal for repeated cattle depredation
18 201118 F Adult Sep 2011 Gravelly Range, BDNF-MT Known, human-caused, under investigation
17 201117 M Adult 28 Aug 2011 Green River, BTNF-WY Known, human-caused, management removal for repeated cattle depredation
16 201116 UNK COY 25 Jun 2011 Pickett Crk, BLM-WY Known, undetermined cause, remains of a COY that had been dead several months found and reported. Date of mortality is approximate.
15 201115 M Adult 24 Aug 2011 Strawberry Crk, BTNF-WY Known, human-caused, management removal for repeated cattle depredation
14 201114 F COY 8 Aug 2011 South Fork Shoshone, PR-WY Known, human-caused, management live removal to Cleveland Metro Zoo, was accompanying mother when she obtained anthropogenic foods on numerous occasions
13 201113 M COY 8 Aug 2011 South Fork Shoshone, PR-WY Known, human-caused, management live removal to Cleveland Metro Zoo, was accompanying mother when she obtained anthropogenic foods on numerous occasions
12 201112 F Adult 7 Aug 2011 South Fork Shoshone, PR-WY Known, human-caused, management removal for obtaining numerous food rewards at private residences, was accompanied by 2 COY
11 201111 WY Known, undetermined cause, under investigation
10 201110 M Subadult 1 Aug 2011 Incinerator Crk, YNP Known, human-caused, management removal for numerous nuisance activities and food rewards associated with a campground escalating to aggressive behavior towards humans to obtain food
9 201109 F Adult 27 Jul 2011 Wagon Crk, BTNF-WY Known, human-caused, management removal for cattle depredations and prior management history for anthroprogenic foods
8 201108 F Adult 18 Jul 2011 Buttermilk Crk, PR-MT Known, human-caused, management removal for repeated food rewards in a campground and at residences
7 201107 M Adult 16 Jul 2011 Fish Crk, BTNF-WY Known, human-caused, management removal for repeated sheep and cattle depredation
6 201106 F Adult 11 Jul 2011 Skull Crk, WY Known, human-caused, road kill
5 201105 2011 WY Known, human-caused, under investigation
4 201104 M Adult 2 Jun 2011 Tangle Crk, YNP Known, human-caused, road kill
3 201103 2011 WY Known, human-caused, under investigation
2 201102 2011 WY Known, under investigation
1 201101 M Adult 7 May 2011 Grass Crk, State-WY Known, human-caused, management removal for breaking into cabin.



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.


NOROCK graphic