2009 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
31 200931 UNK COY 13 Jul 2009 Sheridan Crk, SNF, WY Probable, natural. Radioed female grizzly bear #279 lost 1 of 4 COY between 6/1 and 8/25. Location and mortality date are approximated.
30 200930 UNK COY 10 Jun 2009 Stephens Crk, YNP, MT Probable, natural. Radioed female grizzly bear #576 lost 1 of 2 COY between 6/5 and 6/15. Location and mortality date are approximated.
29 200929 F Adult Fall 2009 SNF, WY Known, undetermined cause, under investigation
28 200928 F Adult 10 Nov 2009 Shoshone River, BOR-WY Known, human-caused, management removal for continued close association to residential area and previous conflict history.
27 200927 F Subadult 2009 SNF, WY Known, undetermined cause, under investigation.
26 200926 M Adult 2009 CTNF, ID Known, human-caused, under investigation
25 200925 UNK COY 14 Oct 2009 Jones Crk, SNF, WY Probable, human-caused, COY of mother that was killed
24 200924 UNK COY 14 Oct 2009 Jones Crk, SNF, WY Probable, human-caused, COY of mother that was killed
23 200923 F Adult 14 Oct 2009 Jones Crk, SNF, WY Known, human-caused, female with 2 COY killed in self-defense by hunter while retireveing harvested elk carcass
22 200922 M Adult 10 Oct 2009 Clark's Fork Yellowstone River, GNF, MT Known, human-caused, hunting related self-defense
21 200921 M Adult 6 Oct 2009 Pacific Crk, BTNF, WY Known, human-caused, management removal for property damage and food reward
20 200920 M Adult 22 Sep 2009 E. Fk. Pilgrim Crk, BTNF, WY Known, human-caused, self-defense by hunter
19 200919 F Subadult 19 Sep 2009 Ditch Crk, BTNF, WY Known, human-caused, unwarrented self-defense kill by deer hunter.
18 200918 M Adult 1 Sep 2009 Cedar Crk, PR-MT Known, human-caused, road kill
17 200917 F Subadult 26 Aug 2009 Deadman Crk, SNF, WY Known, human-caused, mistaken identity kill by black bear achery hunter.
16 200916 UNK COY 8 Aug 2009 SNF, WY Probable, human-caused, COY of female killed in self-defense by hunter scouting sheep
15 200915 UNK COY 8 Aug 2009 SNF, WY Probable, human-caused, COY of female killed in self-defense by hunter scouting sheep
14 200914 F Adult 8 Aug 2009 SNF, WY Known, human-caused, killed in self-defense by hunter scouting for sheep, 2 COY were present
13 200913 F Subadult 25 Jul 2009 Twilight Crk, SNF, WY Known, human-caused, defense of life
12 200912 M Adult Jul 2009 Yellowstone River, MT Known, undetermined cause, during July several anglers reported seeing a dead grizzly bear in the Yellowstone River, downstream from Gardiner. One angler reported reading ear tags on the dead bear. Carcass was found and recovered on 9/25.
11 200911 M COY 19 Jul 2009 Line Crk, BLM, WY Known, human-caused, live removal of male COY whose mother was killed
10 200910 M COY 19 Jul 2009 Line Crk, BLM, WY Known, human-caused, live removal of male COY whose mother was killed
9 200909 F COY 19 Jul 2009 Line Crk, BLM, WY Known, human-caused, live removal of female COY whose mother was killed
8 200908 F Adult 19 Jul 2009 Line Crk, BLM, WY Known, human-caused, female with 3 COY, defense of life while hiking
7 200907 F Adult 15 Jun 2009 Moose Crk, GNF, MT Known, human-caused, defense of life while black bear hunting, DNA results indicated female.
6 200906 M COY 9 Jun 2009 South Fork Shoshone, PR-WY Known, human-caused, road kill.
5 200905 M Subadult 26 May 2009 Big Thumb Crk, YNP, WY Known, natural, killed by an adult grizzly bear.
4 200904 M Adult 10 Jun 2009 North Fork Shoshone River, SNF, WY Known, natural, bear had several puncture wounds to the head and back.
3 200903 M Adult 11 Jun 2009 Blaine Crk, PR-WY Known, human-caused, management removal of bear G142 for repeated cattle depredation.
2 200902 M Subadult 24 May 2009 Newton Crk, SNF, WY Known, human-caused, mistaken identity by black bear hunter.
1 200901 M Adult 12 May 2009 Buffalo Fork, PR-WY Known, human-caused, management removal of bear G135 for nuisance activity in subdivision.



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.


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2010 Annual Report

2010 Annual Report for the Northern Rocky Mountain science Center