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.

Count	Unique	Sex	Age class	Known Mortality Date	Location	Loss
50	201050	UNK	COY	9-Aug-10	Trout Crk, YNP	Probable, natural, collared female lost 1 COY between 7/4-9/16. Mortality date is approximated.
49	201049	F	Adult	5-Nov-10	Donahue Crk, GNF-MT	Known, human-caused, self-defense by hunter, no evidence of young
48	201048	F	Adult	27-Oct-10	Aldrich Crk, SNF-WY	Known, human-caused, hunting related self-defense, human injury, female was accompanied by 2 yearlings
47	201047	M	Adult	24-Oct-10	Lodgepole Crk, SNF-WY	Known, human-caused, self-defense by hunter, hunter was unable to deter bear as it approached. Shot at close range.
46	201046	M	Subadult	23-Oct-10	Wolf Crk, BTNF-MT	Known, human-caused, killed in self-defense by hunter, hunter used pepper spray initially, shot bear as it returned a second time.
45	201045	UNK	COY	19-Oct-10	Crandall Crk, SNF-WY	Probable, human-caused, COY of female that was killed in self-defense during hunting related incident.
44	201044	F	Adult	19-Oct-10	Crandall Crk, SNF-WY	Known, 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
43	201043	M	Adult	5-Jul-10	Venus Crk, SNF-WY	Known, natural, old aged radio-collared bear died at very remote location, no evidence of human involvement
42	201042	F	Adult	17-Oct-10	Green Crk, PR-WY	Known, human-caused, management removal for repeated property damages and food rewards
41	201041	M	Adult	11-Oct-10	Yellowstone River, PR-MT	Known, human-caused, management removal for repeated food rewards by gaining entry to the Gardiner garbage collection site
40	201040	M	Subadult	11-Oct-10	Mountain Crk, BTNF-WY	Known, human-caused, killed in outfitters camp
39	201039	M	Adult	7-Oct-10	Mountain Crk, BTNF-WY	Known, human-caused, killed in outfitters camp
38	201038	F	Adult	7-Oct-10	Jim Crk, SNF-WY	Known, human-caused, killed in self-defense by hunters, human injuries, female was accompanied by a yearling
37	201037	M	Adult	5-Oct-10	West Yellowstone, PR-MT	Known, human-caused, management removal for repeated food rewards and nuisance activity in the town of West Yellowstone. Bear was also in poor condition
36	201036	UNK	COY	2-Oct-10	Lamar River, YNP	Known, natural, wolves observed feeding on a COY grizzly by YNP wolf researchers, investigation of the site revealed only hair, no other remains
35	201035	M	Adult	4-Oct-10	Sheridan Crk, SNF-WY	Known, human-caused, killed in self-defense by elk hunter.
34	201034	M	Adult	29-Sep-10	South Fork Shoshone River, PR-WY	Known, human-caused, management removal for property damage and obtaining food rewards
33	201033	M	Adult	22-Sep-10	Cub Crk, BTNF-WY	Known, human-caused, malicious killing
32	201032	F	Adult	24-Sep-10	Diamond Crk, PR-WY	Known, human-caused, management removal for numerous property damages and food rewards in residential area
31	201031	F	Adult	20-Sep-10	Dry Crk, PR-MT	Known, human-caused, management removal for cattle depredation and aggressive behavior
30	201030	M	Adult	10-Sep-10	Bruin Crk, BTNF-WY	Known, human-caused, hunting related, self-defense at hunter killed elk carcass, one of 2 bears killed at this site on the same day.
29	201029	M	Adult	10-Sep-10	Bruin Crk, BTNF-WY	Known, human-caused, hunting related, self-defense at hunter killed elk carcass, one of 2 bears killed at this site on the same day.
28	201028	M	Adult	7-Sep-10	Horse Crk, BTNF-WY	Known, human-caused, killed in self-defense by guide hunting moose with client.
27	201027	M	Adult	7-Sep-10	Kinky Crk, BTNF-WY	Known, human-caused, management removal for repeated livestock depredations
26	201026	M	Subadult	4-Sep-10	Crow Crk, WRIR-WY	Known, human-caused, killed in self-defense at residence.
25	201025	M	Adult	13-Oct-09	Arrow Crk, SNF-WY	Known, 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
24	201024	M	Adult	29-Aug-10	Badger Crk, PR-WY	Known, human-caused, management removal for repeated livestock depredations
23	201023	F	Subadult	19-Aug-10	Brooks Lake, SNF-WY	Known, human-caused, live removal for numerous food rewards and property damage
22	201022	M	Adult	15-Aug-10	Yellowstone River, YNP	Known, 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
21	201021	M	Adult	15-Aug-10	East Fork Wind River, PR-WY	Known, human-caused, management removal for repeated sheep depredations
20	201020	M	Adult	14-Aug-10	Fish Crk, BTNF-WY	Known, human-caused, shot at close range in self-defense near wolf killed domestic calf carcass.
19	201019	M	Adult	5-Aug-10	Sheridan Crk, SNF-WY	Known, human-caused, management removal for cattle depredation
18	201018	F	Adult	3-Aug-10	Sheridan Crk, SNF-WY	Known, human-caused, management removal for repeated cattle depredations, 2 yearlings accompanying female were relocated
17	201017	M	Yearling	30-Jul-10	Soda Butte Crk, GNF-MT	Known, human-caused, live removal of yearling associated with human fatality and 2 other human injuries
16	201016	F	Yearling	29-Jul-10	Soda Butte Crk, GNF-MT	Known, human-caused, live removal of yearling associated with human fatality and 2 other human injuries
15	201015	F	Yearling	29-Jul-10	Soda Butte Crk, GNF-MT	Known, human-caused, live removal of yearling associated with human fatality and 2 other human injuries
14	201014	F	Adult	28-Jul-10	Soda Butte Crk, GNF-MT	Known, human-caused, management removal for human fatality and 2 other human injuries. Female was accompanied by 3 yearlings
13	201013	M	Subadult	13-Jul-10	Crooked Crk, PR-WY	Known, human-caused, management removal for numerous food rewards and aggressive behavior towards people.
12	201012	M	COY	10-Jul-10	South Fork Shoshone River, PR-WY	Known, human-caused, live removal of lone COY that was frequenting vicinity of ranch buildings
11	201011	F	Adult	24-Jun-10	Whiskey Crk, SNF	Probable, human-caused, collar found under suspicious circumstances. Likely killed between 6/18 and 6/30.
10	201010	F	Adult	8-Nov-09	West Fork Dry Crk, WRIR-WY	Known, 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
9	201009	M	Subadult	2-Jul-10	Solfatara Crk, YNP	Known, human-caused, live removal for repeated nuisance activity, property damage, and bold behavior in campground
8	201008	M	Adult	19-Jun-10	Kitty Crk, SNF, WY	Known, human-caused, management removal for human fatality.
7	201007	M	Yearling	18-Jun-10	Iron Springs Crk, YNP	Known, 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.
6	201006	F	Adult	12-Jun-10	Elkhorn Crk, GNF-MT	Known, human-caused, mistaken identity by black bear hunter
5	201005	F	Adult	7-Jun-10	Blacktail Crk, YNP	Known, natural, likely predation by wolves, extremely poor condition and old age were likely contributing factors.
4	201004	M	Yearling	7-Jun-10	Gallatin River, YNP	Known, human-caused, road kill
3	201003	M	Subadult	2-Jun-10	Spread Crk, GTNP	Known, human-caused, road kill
2	201002	M	Adult	23-May-10	Big Crk, PR-WY	Known, human-caused, management removal for property damage and livestock depredation
1	201001	M	Adult	13-May-10	Grass Crk, State-WY	Known, 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.