Alaska Species Ranking System – Alaska Center for Conservation Science

The Alaska Species Ranking System (ASRS) is a prioritization tool that assesses the conservation status of native vertebrates in Alaska. It was developed in collaboration with the Alaska Department of Fish and Game’s Threatened, Endangered, and Diversity (TED) Program. The goal of the ASRS is to provide detailed information on the conservation needs of Alaska’s wildlife to help the TED Program and their partners set priorities for wildlife conservation and inform Alaska’s State Wildlife Action Plan (SWAP). The ASRS provides an objective way to rank all native vertebrates through a lens that is specific to Alaska, which helps to identify those that require the most focus in the SWAP. Such taxa are called Species of Greatest Conservation Need (SGCN).

The ASRS was initially developed in the mid-2000s. In 2012, the first version of the ASRS was released. Ranks have been regularly updated since then and there have been changes to the ranking system as well. In 2022, staff at ACCS and ADF&G used updated ranks to assess the conservation status of small mammal species in Alaska. In 2025, the ranking system was revised; the ranks shown here reflect the most recent changes. Please fill out a Data Request Form if you would like a copy of the ASRS assessment for one or more taxa.

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Common Name	Scientific Name	Color Rank	Numerical Rank	Status Score	Biological Score	% Global Population
Alaska Hare	Lepus othus	Yellow	IV	0	-38	Endemic
Alaska Marmot	Marmota broweri	Orange	III	0	-6	Endemic
Alder Flycatcher	Empidonax alnorum	Red	II	6	-32	<25%
Aleutian Tern	Onychoprion aleuticus	Red	II	6	-21	<25%
American Dipper	Cinclus mexicanus	Yellow	IV	0	-38	<25%
American Golden-Plover	Pluvialis dominica	Yellow	IV	0	-33	25-74%
American Kestrel	Falco sparverius	Red	II	6	-28	<25%
American Marten, Kenai	Martes americana kenaiensis	Yellow	IV	0	-19	Endemic
American Pipit	Anthus rubescens	Red	II	6	-32	<25%
American Redstart	Setophaga ruticilla	Orange	III	0	-14	<25%
American Three-Toed Woodpecker	Picoides dorsalis	Yellow	IV	0	-28	<25%
American Tree Sparrow	Spizelloides arborea	Yellow	IV	0	-39	25-74%
Arctic Fox	Vulpes lagopus	Blue	VI	-11	-24	<25%
Arctic Ground Squirrel	Urocitellus parryii	Yellow	IV	0	-40	25-74%
Arctic Ground Squirrel (plesius)	Urocitellus parryii plesius	Yellow	IV	0	-26	25-74%
Arctic Ground Squirrel, Aleutian	Urocitellus parryii ablusus	Yellow	IV	0	-34	Endemic
Arctic Ground Squirrel, Barrow	Urocitellus parryii kennicottii	Yellow	IV	0	-32	25-74%
Arctic Ground Squirrel, Kodiak Island	Urocitellus parryii kodiacensis	Orange	III	0	-4	Endemic
Arctic Ground Squirrel, Osgood's	Urocitellus parryii osgoodi	Yellow	IV	0	-26	Endemic
Arctic Ground Squirrel, Shumagin Islands	Urocitellus parryii nebulicola	Orange	III	0	-4	Endemic
Arctic Ground Squirrel, St. Lawrence Island	Urocitellus parryii lyratus	Orange	III	0	0	Endemic
Arctic Loon	Gavia arctica	Orange	III	0	-10	<25%
Arctic Tern	Sterna paradisaea	Yellow	IV	0	-34	<25%
Arctic Warbler	Phylloscopus borealis	Yellow	IV	0	-32	<25%
Baird's Beaked Whale, Alaska Stock	Berardius bairdii	Orange	III	0	-13.5	Unknown
Bald Eagle	Haliaeetus leucocephalus	Blue	VI	-3	-24	25-74%
Bank Swallow	Riparia riparia	Red	II	16	-32	<25%
Bar-Tailed Godwit (baueri)	Limosa lapponica baueri	Red	I	10	-12	Endemic
Baranof Island Short-tailed Weasel	Mustela erminea initis	Orange	III	0	-2	Endemic
Barn Swallow	Hirundo rustica	Red	II	12	-20	<25%
Barren Ground Shrew	Sorex ugyunak	Yellow	IV	0	-32	25-74%
Bearded Seal, Beringia DPS	Erignathus barbatus nauticus	Red	II	6	-30	25-74%
Beluga, Cook Inlet DPS	Delphinapterus leucas pop. 4	Red	I	20	20	Endemic
Black Brant, Pacific	Branta bernicla nigricans	Red	I	12	4	≥75%
Black Guillemot	Cepphus grylle	Red	I	10	20	<25%
Black Oystercatcher	Haematopus bachmani	Orange	III	0	11	25-74%
Black Scoter	Melanitta americana	Blue	V	2	-16	25-74%
Black Swift	Cypseloides niger	Red	I	6	11	<25%
Black-Backed Woodpecker	Picoides arcticus	Yellow	IV	0	-18	<25%
Black-Bellied Plover	Pluvialis squatarola	Yellow	IV	0	-20	Unknown
Black-Capped Chickadee	Poecile atricapillus	Blue	VI	-6	-38	<25%
Black-Footed Albatross	Phoebastria nigripes	Blue	V	6	-14	25-74%
Black-Legged Kittiwake	Rissa tridactyla	Red	II	5	-20	25-74%
Blackpoll Warbler	Setophaga striata	Red	II	10	-36	<25%
Bluethroat	Luscinia svecica	Yellow	IV	0	-32	<25%
Bohemian Waxwing	Bombycilla garrulus	Red	II	6	-28	<25%
Boreal Chickadee	Poecile hudsonicus	Blue	VI	-6	-35	<25%
Boreal Owl	Aegolius funereus	Yellow	IV	0	-22	<25%
Bowhead Whale, Western Arctic Stock	Balaena mysticetus	Blue	V	-3	-3	≥75%
Brambling	Fringilla montifringilla	Orange	III	0	16	<25%
Bristle-Thighed Curlew	Numenius tahitiensis	Yellow	IV	0	-22	≥75%
Brown Creeper	Certhia americana	Yellow	IV	0	-26	<25%
Brown Creeper (alascensis)	Certhia americana alascensis	Orange	III	0	-16	Endemic
Buff-Breasted Sandpiper	Calidris subruficollis	Red	I	12	-12	<25%
Buller's Shearwater	Ardenna bulleri	Orange	III	0	-13	<25%
Bushy-Tailed Woodrat	Neotoma cinerea	Yellow	IV	0	-19	<25%
Cackling Goose, Small	Branta hutchinsii minima	Blue	V	-3	-16	Endemic
Cackling Goose, Taverner's	Branta hutchinsii taverneri	Blue	VI	-6	-22	≥75%
California Myotis	Myotis californicus	Orange	III	0	-7	<25%
Canada Goose, Dusky	Branta canadensis occidentalis	Red	I	8	-6	≥75%
Canada Jay	Perisoreus canadensis	Red	II	6	-38	<25%
Cassin's Auklet	Ptychoramphus aleuticus	Blue	VI	4	-22	<25%
Cedar Waxwing	Bombycilla cedrorum	Red	II	1	-35.5	<25%
Chestnut-Backed Chickadee	Poecile rufescens	Blue	VI	-6	-26	25-74%
Cinereus Shrew	Sorex cinereus	Yellow	IV	0	-42	<25%
Cinereus Shrew (hollisteri)	Sorex cinereus hollisteri	Yellow	IV	0	-32	Endemic
Cinereus Shrew (streatori)	Sorex cinereus streatori	Yellow	IV	0	-24	25-74%
Collared Pika	Ochotona collaris	Yellow	IV	0	-27	25-74%
Columbia Spotted Frog	Rana luteiventris	Yellow	IV	0	-19	<25%
Common Eider, Pacific	Somateria mollissima v-nigrum	Blue	VI	4	-24	25-74%
Common Minke Whale, Alaska Stock	Balaenoptera acutorostrata	Yellow	IV	0	-18.7	<25%
Common Murre	Uria aalge	Blue	V	-11	-10	<25%
Common Muskrat	Ondatra zibethicus	Red	II	6	-41	<25%
Common Raven (kamtschaticus)	Corvus corax kamtschaticus	Yellow	IV	0	-18	<25%
Cuvier's Beaked Whale, Alaska Stock	Ziphius cavirostris	Orange	III	0	-14.5	<25%
Dall's Porpoise, Alaska Stock	Phocoenoides dalli	Yellow	IV	0	-36.5	<25%
Dark-Eyed Junco	Junco hyemalis	Blue	VI	-6	-36	25-74%
Dunlin	Calidris alpina	Red	II	5	-30	25-74%
Dunlin, Arctic	Calidris alpina arcticola	Red	I	16	-16	≥75%
Dunlin, Pacific	Calidris alpina pacifica	Blue	V	-11	-16	Endemic
Emperor Goose	Anser canagicus	Blue	V	-3	2	≥75%
Ermine or Short-tailed Weasel	Mustela erminea	Yellow	IV	0	-42	<25%
Fin Whale, Northeast Pacific Stock	Balaenoptera physalus	Red	II	8	-20	<25%
Fork-Tailed Storm-Petrel (furcatus)	Hydrobates furcatus furcatus	Blue	V	4	-14	≥75%
Fork-Tailed Storm-Petrel (plumbeus)	Hydrobates furcatus plumbeus	Yellow	IV	0	-28	<25%
Fox Sparrow	Passerella iliaca	Blue	VI	-6	-38	25-74%
Fox Sparrow, Chilkat Sooty	Passerella iliaca chilcatensis	Yellow	IV	0	-20	Endemic
Fox Sparrow, Kodiak	Passerella iliaca insularis	Orange	III	0	-8	Endemic
Fox Sparrow, Shumagin	Passerella iliaca unalaschcensis	Yellow	IV	0	-20	Endemic
Fox Sparrow, Townsend's	Passerella iliaca townsendi	Blue	VI	-6	-20	≥75%
Fox Sparrow, Valdez	Passerella iliaca sinuosa	Yellow	IV	0	-20	Endemic
Fox Sparrow, Yakutat	Passerella iliaca annectens	Orange	III	0	-14	Endemic
Glaucous Gull	Larus hyperboreus	Blue	VI	-10	-32	25-74%
Glaucous-Winged Gull	Larus glaucescens	Yellow	IV	0	-29	25-74%
Golden Eagle	Aquila chrysaetos	Orange	III	0	-8	<25%
Golden-Crowned Kinglet	Regulus satrapa	Yellow	IV	0	-25	<25%
Golden-Crowned Sparrow	Zonotrichia atricapilla	Yellow	IV	0	-38	≥75%
Goshawk, American	Astur atricapillus	Blue	VI	-6	-29	<25%
Goshawk, Queen Charlotte	Astur atricapillus laingi	Orange	III	0	4	Unknown
Gray-Cheeked Thrush	Catharus minimus	Red	II	6	-44	25-74%
Gray-Crowned Rosy-Finch	Leucosticte tephrocotis	Yellow	IV	0	-20	Unknown
Gray-Headed Chickadee (lathami)	Poecile cinctus lathami	Red	II	12	-20	Unknown
Gray-Tailed Tattler	Tringa brevipes	Orange	III	0	-5	<25%
Great Gray Owl	Strix nebulosa	Yellow	IV	0	-20	<25%
Greater White-Fronted Goose, Midcontinent Pop.	Anser albifrons frontalis	Blue	VI	-11	-22	25-74%
Greater White-Fronted Goose, Tule	Anser albifrons elgasi	Red	I	0	-2	≥75%
Greater Yellowlegs	Tringa melanoleuca	Yellow	IV	0	-36	25-74%
Gyrfalcon	Falco rusticolus	Red	I	0	-6	<25%
Harbor Porpoise	Phocoena phocoena	Red	II	6	-40	<25%
Harbor Porpoise, Bering Sea Stock	Phocoena phocoena pop. 3	Orange	III	0	-14	<25%
Harbor Porpoise, Gulf of Alaska Stock	Phocoena phocoena pop. 2	Orange	III	0	-12	<25%
Harbor Porpoise, Southeast Alaska Stock	Phocoena phocoena pop. 1	Orange	III	0	6	<25%
Harbor Seal, Alaska Stocks	Phoca vitulina richardii	Red	II	10	-30	25-74%
Harlequin Duck	Histrionicus histrionicus	Blue	VI	-6	-34	25-74%
Hermit Thrush	Catharus guttatus	Blue	VI	-11	-39	<25%
Herring Gull	Larus argentatus	Orange	III	0	-10	<25%
Hoary Marmot	Marmota caligata	Yellow	IV	0	-32	25-74%
Hoary Marmot, Glacier Bay	Marmota caligata vigilis	Orange	III	0	16.5	Endemic
Hoary Marmot, Montague Island	Marmota caligata sheldoni	Orange	III	0	29.5	Endemic
Holarctic Least Shrew	Sorex minutissimus	Yellow	IV	0	-36	<25%
Horned Grebe	Podiceps auritus	Red	II	12	-33.6	<25%
Horned Lark	Eremophila alpestris	Red	II	6	-28	<25%
Horned Puffin	Fratercula corniculata	Yellow	IV	0	-22	≥75%
Iceland Gull (Includes Thayer's)	Larus glaucoides	Orange	III	0	-5	Unknown
Insular Vole	Microtus abbreviatus	Blue	V	-11	-12	Endemic
Ivory Gull	Pagophila eburnea	Red	I	10	-6	<25%
Killdeer	Charadrius vociferus	Red	II	6	-20	<25%
King Eider	Somateria spectabilis	Blue	V	-3	-10	<25%
Kittlitz's Murrelet	Brachyramphus brevirostris	Blue	VI	-3	-26	25-74%
Lapland Longspur	Calcarius lapponicus	Red	II	6	-38	Unknown
Laysan Albatross	Phoebastria immutabilis	Blue	V	4	-14	25-74%
Leach's Storm-Petrel (leucorhous)	Hydrobates leucorhous leucorhous	Red	II	0	-26	25-74%
Least Sandpiper	Calidris minutilla	Red	II	6	-33	25-74%
Lesser Scaup	Aythya affinis	Blue	VI	-5	-34	<25%
Lesser Yellowlegs	Tringa flavipes	Red	II	10	-36	25-74%
Little Brown Myotis	Myotis lucifugus	Yellow	IV	0	-25	<25%
Long-Billed Dowitcher	Limnodromus scolopaceus	Yellow	IV	0	-36	Unknown
Long-Eared Myotis	Myotis evotis	Orange	III	0	-7	<25%
Long-Legged Myotis	Myotis volans	Orange	III	0	3	<25%
Long-Tailed Jaeger	Stercorarius longicaudus	Orange	III	0	-16	<25%
Long-Tailed Vole	Microtus longicaudus	Yellow	IV	0	-38	<25%
Long-Tailed Vole, (littoralis)	Microtus longicaudus littoralis	Yellow	IV	0	-36	25-74%
Long-Tailed Vole, Coronation Island	Microtus longicaudus coronarius	Orange	III	0	3	Endemic
Long-Toed Salamander	Ambystoma macrodactylum	Orange	III	0	-2	<25%
Macgillivray's Warbler	Geothlypis tolmiei	Orange	III	0	-9	<25%
Mainland Southeast Short-tailed Weasel	Mustela erminea alascensis	Yellow	IV	0	-20.4	Endemic
Marbled Godwit (beringiae)	Limosa fedoa beringiae	Orange	III	0	4	Endemic
Marbled Murrelet	Brachyramphus marmoratus	Blue	VI	-5	-34	≥75%
Mckay's Bunting	Plectrophenax hyperboreus	Orange	III	0	-2	Endemic
Meadow Jumping Mouse	Zapus hudsonius	Yellow	IV	0	-26	<25%
Meadow Vole	Microtus pennsylvanicus	Yellow	IV	0	-44	<25%
Meadow Vole, Admiralty	Microtus pennsylvanicus admiraltiae	Orange	III	0	-4	Endemic
Merlin, Black	Falco columbarius suckleyi	Red	II	12	-20	25-74%
Montane Shrew, Northern	Sorex obscurus	Yellow	IV	0	-38	25-74%
Mottled Petrel	Pterodroma inexpectata	Yellow	IV	0	-26.5	<25%
Nearctic Collared Lemming	Dicrostonyx groenlandicus	Yellow	IV	0	-32	<25%
Neartic Brown Lemming	Lemmus trimucronatus	Yellow	IV	0	-42	25-74%
Neartic Brown Lemming, Nunivak Island	Lemmus trimucronatus harroldi	Red	I	6	-1	Endemic
Neartic Brown Lemming, black-footed	Lemmus trimucronatus nigripes	Orange	III	0	17	Endemic
North American Porcupine	Erethizon dorsatum	Yellow	IV	0	-34.5	Unknown
North American Red Squirrel	Tamiasciurus hudsonicus	Yellow	IV	0	-30	<25%
North American Red Squirrel (petulans)	Tamiasciurus hudsonicus petulans	Orange	III	0	-16	25-74%
North American Red Squirrel (preblei)	Tamiasciurus hudsonicus preblei	Yellow	IV	0	-24	25-74%
North American Red Squirrel, Kenai	Tamiasciurus hudsonicus kenaiensis	Yellow	IV	0	-18	Endemic
North American Red Squirrel, Kupreanof	Tamiasciurus hudsonicus picatus	Yellow	IV	0	-18	≥75%
North American River Otter, Kodiak	Lontra canadensis kodiacensis	Yellow	IV	0	-17	Endemic
North American River Otter, Prince of Wales	Lontra canadensis mira	Red	II	6	-22.5	Endemic
North Pacific Right Whale, Eastern North Pacific Stock	Eubalaena japonica	Red	I	6	19.5	Unknown
Northern Bog Lemming	Synaptomys borealis	Blue	VI	-5	-23	<25%
Northern Flying Squirrel	Glaucomys sabrinus	Yellow	IV	0	-27	<25%
Northern Flying Squirrel, Prince of Wales	Glaucomys sabrinus griseifrons	Orange	III	0	-1	Endemic
Northern Fulmar	Fulmarus glacialis	Red	I	1	10	<25%
Northern Fur Seal, Eastern Pacific Stock	Callorhinus ursinus	Red	I	8	-6	25-74%
Northern Hawk-Owl	Surnia ulula	Yellow	IV	0	-22	<25%
Northern Pintail	Anas acuta	Blue	VI	-6	-26	<25%
Northern Red-Backed Vole	Clethrionomys rutilus	Yellow	IV	0	-38	<25%
Northern Saw-Whet Owl	Aegolius acadicus	Yellow	IV	0	-22	<25%
Northern Shrike	Lanius borealis	Red	II	6	-26	25-74%
Northern Wheatear	Oenanthe oenanthe	Yellow	IV	0	-28	<25%
Northwestern Deermouse	Peromyscus keeni	Yellow	IV	0	-36	25-74%
Northwestern Salamander	Ambystoma gracile	Orange	III	0	8	<25%
Olive-Sided Flycatcher	Contopus cooperi	Red	II	16	-32	<25%
Orange-Crowned Warbler	Leiothlypis celata	Yellow	IV	0	-31	25-74%
Pacific Golden-Plover	Pluvialis fulva	Yellow	IV	0	-30	<25%
Pacific Marten	Martes caurina	Red	I	12	4	Unknown
Pacific Walrus, Alaska Stock	Odobenus rosmarus divergens	Red	I	10	-16	≥75%
Pacific White-sided Dolphin, North Pacific Stock	Sagmatias obliquidens	Yellow	IV	0	-29.5	<25%
Pacific Wren	Troglodytes pacificus	Yellow	IV	0	-36	25-74%
Pacific Wren, Attu	Troglodytes pacificus meligerus	Orange	III	0	8	Endemic
Pacific Wren, Kiska	Troglodytes pacificus kiskensis	Orange	III	0	0	Endemic
Pacific Wren, Kodiak	Troglodytes pacificus helleri	Orange	III	0	-14	Endemic
Pacific Wren, Pribilof	Troglodytes pacificus alascensis	Orange	III	0	10	Endemic
Pacific Wren, Semidi	Troglodytes pacificus semidiensis	Orange	III	0	12	Endemic
Parakeet Auklet	Aethia psittacula	Yellow	IV	0	-28	25-74%
Parasitic Jaeger	Stercorarius parasiticus	Yellow	IV	0	-27.2	Unknown
Pectoral Sandpiper	Calidris melanotos	Red	II	10	-30	25-74%
Pelagic Cormorant	Urile pelagicus	Yellow	IV	0	-17	25-74%
Peregrine Falcon	Falco peregrinus	Blue	V	2	-12	<25%
Peregrine Falcon, Paele's	Falco peregrinus pealei	Orange	III	0	-7	25-74%
Pigeon Guillemot	Cepphus columba	Red	II	8	-34	25-74%
Pine Grosbeak	Pinicola enucleator	Blue	VI	-6	-44	<25%
Pine Siskin	Spinus pinus	Blue	VI	-6	-36	<25%
Pink-Footed Shearwater	Puffinus creatopus	Orange	III	0	-11	<25%
Polar Bear, Southern Beaufort Sea Stock	Ursus maritimus	Red	I	18	-6	<25%
Pomarine Jaeger	Stercorarius pomarinus	Orange	III	0	0	<25%
Pribilof Island Shrew	Sorex pribilofensis	Orange	III	0	14	Endemic
Prince of Wales Island Short-tailed Weasel	Mustela erminea celenda	Red	I	10	-3.9	Endemic
Pygmy Shrew	Sorex hoyi	Yellow	IV	0	-38	<25%
Red Crossbill	Loxia curvirostra	Yellow	IV	0	-32	<25%
Red Knot, Pacific	Calidris canutus roselaari	Red	I	6	2	25-74%
Red Phalarope	Phalaropus fulicarius	Red	II	6	-36	25-74%
Red-Breasted Sapsucker	Sphyrapicus ruber	Blue	VI	-10	-19	25-74%
Red-Faced Cormorant	Urile urile	Red	I	6	-11	Unknown
Red-Legged Kittiwake	Rissa brevirostris	Blue	V	-3	4	≥75%
Red-Necked Grebe	Podiceps grisegena	Red	II	6	-37	<25%
Red-Necked Phalarope	Phalaropus lobatus	Red	II	6	-33	25-74%
Red-Necked Stint	Calidris ruficollis	Orange	III	0	2	<25%
Red-Tailed Hawk	Buteo jamaicensis	Yellow	IV	0	-28	<25%
Red-Throated Loon	Gavia stellata	Red	II	6	-22	<25%
Red-Throated Pipit	Anthus cervinus	Orange	III	0	2	<25%
Red-Winged Blackbird	Agelaius phoeniceus	Red	II	6	-20	<25%
Redpoll	Acanthis flammea	Red	II	6	-38	<25%
Ribbon Seal	Histriophoca fasciata	Red	II	8	-20	25-74%
Ringed Seal, Arctic Stock	Pusa hispida hispida	Red	II	0	-32	<25%
Rock Ptarmigan, Evermann's	Lagopus muta evermanni	Red	I	12	-11	Endemic
Rock Ptarmigan, Townsend's	Lagopus muta townsendi	Orange	III	0	1	Endemic
Rock Ptarmigan, Turner's	Lagopus muta atkhensis	Orange	III	0	11	Endemic
Rock Sandpiper, Aleutian	Calidris ptilocnemis couesi	Yellow	IV	0	-24	Endemic
Rock Sandpiper, Bering Sea	Calidris ptilocnemis tschuktschorum	Yellow	IV	0	-24	≥75%
Rock Sandpiper, Pribilof	Calidris ptilocnemis ptilocnemis	Orange	III	0	4	Endemic
Root Vole	Microtus oeconomus	Yellow	IV	0	-38	<25%
Root Vole, Montague Island	Microtus oeconomus elymocetes	Red	I	6	5	Endemic
Root Vole, Punuk Island	Microtus oeconomus punukensis	Red	I	12	-4	Endemic
Root Vole, Shumagin Island	Microtus oeconomus popofensis	Orange	III	0	-1	Endemic
Root Vole, Sitka	Microtus oeconomus sitkensis	Red	I	6	-5	Endemic
Root Vole, Unalaska	Microtus oeconomus unalascensis	Yellow	IV	0	-28	Endemic
Root Vole, Yakutat	Microtus oeconomus yakutatensis	Orange	III	0	0	Endemic
Ross's Gull	Rhodostethia rosea	Yellow	IV	0	-38.2	≥75%
Rough-Legged Hawk	Buteo lagopus	Yellow	IV	0	-23	<25%
Ruby-Crowned Kinglet (calendula)	Corthylio calendula calendula	Yellow	IV	0	-32	<25%
Ruby-Crowned Kinglet (grinnelli)	Corthylio calendula grinnelli	Blue	VI	-6	-20	25-74%
Ruddy Turnstone	Arenaria interpres	Yellow	IV	0	-34	<25%
Rufous Hummingbird	Selasphorus rufus	Red	II	10	-24	<25%
Rusty Blackbird	Euphagus carolinus	Blue	VI	-11	-38	<25%
Sabine's Gull	Xema sabini	Blue	VI	-10	-32	<25%
Sanderling	Calidris alba	Orange	III	0	-8	<25%
Sandhill Crane	Antigone canadensis	Blue	VI	-6	-28	<25%
Savannah Sparrow	Passerculus sandwichensis	Red	II	6	-38	<25%
Sea Otter	Enhydra lutris	Blue	VI	5.6	-37.2	≥75%
Semipalmated Sandpiper	Calidris pusilla	Blue	VI	-6	-40	<25%
Short-Billed Dowitcher (caurinus)	Limnodromus griseus caurinus	Red	II	6	-36	≥75%
Short-Billed Gull	Larus brachyrhynchus	Yellow	IV	0	-34	25-74%
Short-Eared Owl	Asio flammeus	Red	II	1	-34	<25%
Short-Tailed Shearwater	Puffinus tenuirostris	Red	II	6	-30	Unknown
Silver-Haired Bat	Lasionycteris noctivagans	Orange	III	0	-7	<25%
Singing Vole	Microtus miurus	Yellow	IV	0	-32	25-74%
Slaty-Backed Gull	Larus schistisagus	Orange	III	0	20	<25%
Smith's Longspur	Calcarius pictus	Yellow	IV	0	-26	<25%
Snow Bunting	Plectrophenax nivalis	Red	II	6	-36	<25%
Snow Bunting (townsendi)	Plectrophenax nivalis townsendi	Yellow	IV	0	-18	≥75%
Snowshoe Hare	Lepus americanus	Blue	VI	-10	-46	<25%
Snowy Owl	Bubo scandiacus	Red	I	6	-15	<25%
Solitary Sandpiper (cinnamomea)	Tringa solitaria cinnamomea	Blue	VI	3	-24	≥75%
Song Sparrow, Aleutian	Melospiza melodia sanaka	Orange	III	0	-14	Endemic
Song Sparrow, Bischoff	Melospiza melodia insignis	Yellow	IV	0	-20	Unknown
Song Sparrow, Giant	Melospiza melodia maxima	Yellow	IV	0	-20	Endemic
Song Sparrow, Kenai	Melospiza melodia kenaiensis	Orange	III	0	-14	Endemic
Song Sparrow, Sooty	Melospiza melodia rufina	Yellow	IV	0	-20	≥75%
Song Sparrow, Yakutat	Melospiza melodia caurina	Orange	III	0	-14	Unknown
Sooty Shearwater	Puffinus griseus	Red	II	6	-26	<25%
Southern Red-Backed Vole	Clethrionomys gapperi	Yellow	IV	0	-28	<25%
Southern Red-Backed Vole, Gapper's	Clethrionomys gapperi stikinensis	Yellow	IV	0	-28.62	25-74%
Southern Red-Backed Vole, Phaeus	Clethrionomys gapperi phaeus	Yellow	IV	0	-24.62	<25%
Southern Red-Backed Vole, Revillagigedo Island	Clethrionomys gapperi solus	Red	I	6	2	Endemic
Southern Red-Backed Vole, Wrangell Island	Clethrionomys gapperi wrangeli	Orange	III	0	-16.62	Endemic
Sperm Whale, North Pacific Stock	Physeter macrocephalus	Orange	III	0	-8.5	<25%
Spotted Sandpiper	Actitis macularius	Blue	VI	-6	-37	25-74%
Spotted Seal, Bering Stock	Phoca largha	Red	II	6	-30	25-74%
Spruce Grouse	Canachites canadensis	Red	II	0	-32	<25%
St. Lawrence Island Shrew	Sorex jacksoni	Orange	III	0	8	Endemic
Stejneger's Beaked Whale, Alaska Stock	Mesoplodon stejnegeri	Orange	III	0	-3.5	25-74%
Stilt Sandpiper	Calidris himantopus	Red	II	6	-24	<25%
Suemez Island Short-tailed Weasel	Mustela erminea seclusa	Orange	III	0	16	Endemic
Surf Scoter	Melanitta perspicillata	Red	II	10	-28	Unknown
Surfbird	Calidris virgata	Yellow	IV	0	-17	≥75%
Taiga or Yellow-cheeked Vole	Microtus xanthognathus	Yellow	IV	0	-38	<25%
Thick-Billed Murre	Uria lomvia	Blue	V	-11	-10	25-74%
Townsend'S Warbler	Setophaga townsendi	Blue	VI	-6	-30	25-74%
Tree Swallow	Tachycineta bicolor	Red	II	16	-32	<25%
Trumpeter Swan	Cygnus buccinator	Blue	VI	-8	-24	25-74%
Tufted Puffin	Fratercula cirrhata	Yellow	IV	0	-22	≥75%
Tundra Shrew	Sorex tundrensis	Yellow	IV	0	-38	<25%
Upland Sandpiper	Bartramia longicauda	Yellow	IV	0	-30	<25%
Varied Thrush	Ixoreus naevius	Blue	VI	-6	-35	25-74%
Vaux's Swift	Chaetura vauxi	Red	I	6	6	<25%
Violet-Green Swallow	Tachycineta thalassina	Yellow	IV	0	-44	<25%
Wandering Tattler	Tringa incana	Yellow	IV	0	-24	25-74%
Western Grebe	Aechmophorus occidentalis	Red	II	6	-17	<25%
Western Sandpiper	Calidris mauri	Red	II	6	-24	≥75%
Western Screech-Owl	Megascops kennicottii	Red	II	6	-20	<25%
Western Toad	Anaxyrus boreas	Yellow	IV	0	-28	<25%
Western Water Shrew	Sorex navigator	Yellow	IV	0	-30	<25%
Western Wood-Pewee	Contopus sordidulus	Red	II	10	-30	<25%
Whimbrel	Numenius phaeopus	Yellow	IV	0	-36	25-74%
Whiskered Auklet	Aethia pygmaea	Blue	V	2	-16	≥75%
White-Crowned Sparrow	Zonotrichia leucophrys	Red	II	1	-24	25-74%
White-Winged Scoter	Melanitta fusca	Blue	VI	-3	-28	<25%
Willow Ptarmigan	Lagopus lagopus	Red	II	5	-32	<25%
Wilson's Snipe	Gallinago delicata	Yellow	IV	0	-36	<25%
Wilson's Warbler	Cardellina pusilla	Yellow	IV	0	-32	25-74%
Wood Frog	Lithobates sylvaticus	Yellow	IV	0	-30	<25%
Wood Sandpiper	Tringa glareola	Orange	III	0	-1	<25%
Yellow-Billed Loon	Gavia adamsii	Red	I	6	6	<25%
Yellow-Rumped Warbler	Setophaga coronata	Yellow	IV	0	-39	<25%

Looking for more?

Range maps are available from the Wildlife Data Portal (compatible with Google Chrome and Microsoft Edge). References cited in the Conservation Reports can be viewed on our online reference library. Can’t find the report you’re looking for? Reach out to us and we’ll do our best to help.