This information is preliminary and is subject to revision. It is being provided to meet the need for timely best science. The information is provided on the condition that neither the U.S. Geological Survey nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information. Release of information will be limited for mortalities under investigation.

Count	Unique	Sex	Age class	Known Mortality Date	Location	Demographic Monitoring Area	Loss
Part A. Documented known and probable grizzly bear mortalities that occurred during 2018 inside the Demographic Monitoring Area (DMA).
1	201803	M	Adult	5/8/2018	Clarks Fork Yellowstone, SNF-WY	Inside	Known, human-caused, humane removal of old bear in very poor condition that was unable to lift hind legs.
2	201804	M	Adult	5/9/2018	Green Crk, PR-WY	Inside	Known, human-caused, management capture and removal for breaking into a building and obtaining a food reward.
3	201808			2018	WY	Inside	Known. Under investigation.
4	201809			2018	WY	Inside	Probable. Under investigation.
5	201810			2018	WY	Inside	Probable. Under investigation.
6	201811			2018	WY	Inside	Probable. Under investigation.
7	201814			2018	WY	Inside	Known. Under investigation.
8	201815			2018	WY	Inside	Probable. Under investigation.
9	201816			2018	WY	Inside	Probable. Under investigation.
10	201820	M	Adult	7/8/2018	Crow Crk, BTNF-WY	Inside	Known, human-caused, management capture and removal for cattle depredations.
11	201821	M	Adult	7/13/2018	Mosquito Lake, BTNF-WY	Inside	Known, human-caused, management capture and removal for cattle depredations.
12	201822	M	Adult	7/13/2018	Wagon Crk, BTNF-WY	Inside	Known, human-caused, management capture and removal for cattle depredations.
13	201823	M	Subadult	7/20/2018	Mill Crk, CTNF-ID	Inside	Known, human-caused, management removal for bold behavior and obtaining unsecured anthropogenic food reward.
14	201824	F	Subadult	4/29/2018	Coulter Crk, BTNF-WY	Inside	Known, natural, likely killed by another bear.
15	201825	F	Adult	7/25/2018	Gypsum Crk, BTNF-WY	Inside	Known, human-caused, management removal for multiple cattle depredations.
16	201826	Unk	Adult	7/19/2018	Yellowstone River, BTNF-WY	Inside	Known, natural, killed and consumed by another bear(s).
17	201827	M	Adult	8/1/2018	Gypsum Crk, BTNF-WY	Inside	Known, human-caused, management capture and removal for cattle depredations.
18	201828	M	Adult	8/5/2018	Gypsum Crk, BTNF-WY	Inside	Known, human-caused, management capture and removal for cattle depredations.
19	201831			2018	MT	Inside	Under investigation.
20	201832	M	Adult	8/13/2018	Wagon Crk, BTNF-WY	Inside	Known, human-caused, management capture and removal for cattle depredations.
21	201834	M	Yearling	8/14/2018	Henrys Fork, PR-ID	Inside	Known, human-caused, management live removal for bold behavior towards humans at campgrounds and obtaining anthropogenic food rewards at numerous residences.
22	201835	M	Adult	8/30/2018	Reader Crk, PR-MT	Inside	Known, human-caused, management capture and removal for cattle depredations.
23	201838	M	Adult	9/3/2018	North Fork Shoshone, PR-WY	Inside	Known, human-caused, management capture and removal for property damage and livestock depredations.
24	201840	M	Subadult	9/6/2018	Fish Crk, BTNF-WY	Inside	Known, human-caused, management capture and removal for cattle depredations.
25	201842	M	Subadult	9/6/2018	North Fork Shoshone, SNF-WY	Inside	Known, human-caused, vehicle collision.
26	201843	F	Adult	9/16/2018	Soda Fork, BTNF-WY	Inside	Known, human-caused, management capture and removal for public safety of female with a male yearling involved in human fatality.
27	201844	M	Yearling	9/16/2018	Soda Fork, BTNF-WY	Inside	Known, human-caused, management capture and removal for public safety of male yearling involved in human fatality.
28	201845	M	Adult	9/10/2018	Russell Crk, SNF-WY	Inside	Known, natural, specific mechanism was likely infected injury in the groin area not thought to be human-caused.
29	201846	F	Adult	9/6/2018	South Fork Wood River, SNF-WY	Inside	Known, natural, evidence suggest bear was killed and consumed at site of a deer carcass.
30	201848	M	Adult	9/21/2018	North Fork Shoshone, PR-WY	Inside	Known, human-caused, management capture and removal for obtaining anthropogenic food rewards at numerous residences, property damage and poultry depredation.
31	201849	M	Adult	9/25/2018	Corral Crk, SNF-WY	Inside	Known, human-caused, management capture and removal for obtaining anthropogenic food rewards and prior conflict history.
32	201850			2018	MT	Inside	Probable. Under investigation.
33	201852	M	Adult	10/1/2018	West DuNoir Crk, SNF-WY	Inside	Known, human-caused, self-defense kill by hunter while processing harvested elk.
34	201854	M	Adult	10/2/2018	Gention Crk, SNF-WY	Inside	Known, human-caused, self-defense kill by elk hunter at site of harvested elk
35	201855	M	Subadult	10/2/2018	Thorofare Crk, BTNF-WY	Inside	Known, human-caused, self-defense kill in hunting camp.
36	201856	F	Adult	10/3/2018	Whit Crk, PR-WY	Inside	Known, human-caused, management capture and removal of female with 2 yearling for obtaining anthropogenic foods and increasingly habituated and bold behavior.
37	201857	M	Yearling	10/3/2018	Whit Crk, PR-WY	Inside	Known, human-caused, management capture and removal of yearling with mother and sibling for obtaining anthropogenic foods and increasingly habituated and bold behavior.
38	201858	M	Yearling	10/3/2018	Whit Crk, PR-WY	Inside	Known, human-caused, management capture and removal of yearling with mother and sibling for obtaining anthropogenic foods and increasingly habituated and bold behavior.
39	201859	F	Adult	10/3/2018	Rock Crk, BTNF-WY	Inside	Known, human-caused, self-defense kill by hunter of an unmarked female with 2 cubs.
40	201860	Unk	Cub	10/3/2018	Rock Crk, BTNF-WY	Inside	Probable, human-caused, 1st of 2 cubs of unmarked female killed in self-defense by hunter.
41	201861	Unk	Cub	10/3/2018	Rock Crk, BTNF-WY	Inside	Probable, human-caused, 2nd of 2 cubs of unmarked female killed in self-defense by hunter.
42	201862	F	Subadult	10/4/2018	Yellowstone River, PR-MT	Inside	Known, human-caused, management capture and removal for frequenting residences, habituated behavior, and public safety concerns.
43	201863			2018	WY	Inside	Known. Under investigation.
44	201864	F	Subadult	10/16/2018	Yellowstone River, PR-MT	Inside	Known, human-caused, management capture and removal for frequenting residences, habituated behavior, and public safety concerns.
45	201865	F	Adult	10/19/2018	Corral Crk, SNF-WY	Inside	Known, human-caused, management capture and removal of bear for property damage, obtaining food rewards, and frequenting developed areas.
46	201866	M	Adult	10/19/2018	Reef Crk, SNF-WY	Inside	Known, human-caused, vehicle collision.
47	201870	M	Adult	11/22/2018	Lamar River, YNP	Inside	Known, natural, remains of an adult male found by wolf researchers, carcass had been consumed, mortality date is approximate.
48	201871	Unk	Cub	4/29/2018	Survey Draw, CTNF-ID	Inside	Probable, likely natural, cub of radio-collared female lost between 4/20 and 5/19. Mortality date and location are approximate.
49	201872	Unk	Cub	6/9/2018	Sage Crk, CGNF-MT	Inside	Probable, likely natural, cub of radio-collared female lost between 5/25 and 6/25. Mortality date and location are approximate.
50	201873	Unk	Cub	9/10/2018	Bench Crk, ST-WY	Inside	Probable, likely natural, cub of radio-collared female lost between 9/4 and 9/16. Mortality date and location are approximate.
	201874						Not a probable mortality, radio-collared female was seen multiple times with 2 yearlings during 2019
Part B. Documented known and probable grizzly bear mortalities that occurred during 2018 outside the Demographic Monitoring Area (DMA).
1	201801	M	Adult	4/10/2018	Rawhide Crk, PR-WY	Outside	Known, human-caused, management capture and removal frequenting calving area and history of livestock depredations.
2	201802	M	Adult	4/29/2018	Pat O'Hara Crk, PR-WY	Outside	Known, human-caused, management capture and removal frequenting calving area and bold behavior towards humans.
3	201813	F	Subadult	5/30/2018	Blaine Crk, BLM-WY	Outside	Known, human-caused, management removal for association with multiple livestock conflicts bold behavior towards humans.
4	201817	M	Adult	6/17/2018	Alkali Crk/Heart Mountain Canal, PR-WY	Outside	Known, human-caused, accidental, drowned in fast flowing, cement sided canal.
5	201818	M	Adult	6/22/2018	Bull Crk, BLM-WY	Outside	Known, human-caused, management capture for cattle damage, removed because of poor condition and extensive injuries from unknown cause.
6	201819	M	Adult	6/22/2018	Foster Gulch, PR-MT	Outside	Known, human-caused, management capture and removal for cattle depredations.
7	201829	M	Adult	8/4/2018	Paint Crk, PR-WY	Outside	Known, human-caused, management capture and removal for cattle depredations.
8	201833	F	Adult	8/9/2018	JK Crk, WRIR	Outside	Known, human-caused, management capture and removal for cattle depredations.
9	201836	M	Subadult	9/1/2018	South Fork Shoshone, PR-WY	Outside	Known, human-caused, management capture and removal for repeated nuisance activity at residences and property damage.
10	201837			2018	WY	Outside	Known. Under investigation.
11	201839	M	Adult	9/4/2018	South Fork Owl Crk, PR-WY	Outside	Known, human-caused, management capture and removal for cattle depredations.
12	201841	F	Cub	9/6/2018	Paint Crk, PR-WY	Outside	Known, human-caused, handling mortality. Management capture with mother and siblings for cattle depredations.
13	201847	F	Adult	9/20/2018	Clarks Fork Yellowstone, PR-WY	Outside	Known, human-caused, management capture and removal for frequenting agricultural area and public corn maze.
14	201851	M	Yearling	9/30/2018	Clarks Fork Yellowstone, PR-WY	Outside	Known, human-caused, management capture and removal for frequenting agricultural area and public corn maze.
15	201853	M	Subadult	10/2/2018	Clarks Fork Yellowstone, PR-WY	Outside	Known, human-caused, management capture and removal for frequenting agricultural area and public corn maze.
16	201867	F	Adult	10/25/2018	Shoshone River, PR-WY	Outside	Known, human-caused, management capture and removal of female with 2 cubs for previous conflicts and public satety concerns.
17	201868	M	Cub	10/25/2018	Shoshone River, PR-WY	Outside	Known, human-caused, management capture and removal of cub with mother and sibling for previous conflicts and public satety concerns.
18	201869	F	Cub	10/25/2018	Shoshone River, PR-WY	Outside	Known, human-caused, management capture and removal of cub with mother and sibling for previous conflicts and public satety concerns.
Part C. Documented known and probable grizzly bear mortalities found during 2018 that occurred in years prior to 2018.
1	201805	F	Adult	Fall, 2017	MT	Inside	Known, undetermined cause, mortality likely occurred fall 2017, was found spring 2018. Under investigation.
2	201806	Unk	Cub	Fall, 2017	MT	Inside	Probable, undetermined cause, cub of female that died fall 2017 and was found spring of 2018. Under investigation.
3	201807	Unk	Cub	Fall, 2017	MT	Inside	Probable, undetermined cause, cub of female that died fall 2017 and was found spring of 2018. Under investigation.
4	201812	Unk	Adult	Fall, 2017	Crevice Crk, YNP	Inside	Known, undetermined cause, bear remains found that had been cached and consumed by another bear, likely natural mortality from fall of 2017.
5	201830	M	Adult	2016	Buffalo Fork, BTNF	Inside	Known, undetermined cause, skeletal remains found including skull. Skull characteristics indicated likely adult male. Estimated to have died in 2016.

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 land; ST= state owned land; SNF = Shoshone National Forest; UNK = Unknown; WRIR = Wind River Indian Reservation; WYGF = Wyoming Game and Fish; YNP = Yellowstone National Park.