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.

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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Medium Mammals

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Small Mammals

Amphibians

Marine Mammals

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Landbirds

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Color Rank Definitions

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Common Name	Scientific Name	Rank	Status Score	Biological Score	% Global Population
Alder Flycatcher	Empidonax alnorum	II Red	6	-32	<25%
Aleutian Tern	Onychoprion aleuticus	II Red	6	-21	<25%
American Dipper	Cinclus mexicanus	IV Yellow	0	-38	<25%
American Golden-Plover	Pluvialis dominica	IV Yellow	0	-33	25-74%
American Pipit	Anthus rubescens	II Red	6	-32	<25%
American Redstart	Setophaga ruticilla	III Orange	0	-14	<25%
American Three-Toed Woodpecker	Picoides dorsalis	IV Yellow	0	-28	<25%
American Tree Sparrow	Spizelloides arborea	IV Yellow	0	-39	25-74%
Arctic Fox	Vulpes lagopus	VI Blue	-11	-24	<25%
Arctic Loon	Gavia arctica	III Orange	0	-10	<25%
Arctic Tern	Sterna paradisaea	IV Yellow	0	-34	<25%
Arctic Warbler	Phylloscopus borealis	IV Yellow	0	-32	<25%
Bank Swallow	Riparia riparia	II Red	16	-32	<25%
Bar-Tailed Godwit (baueri)	Limosa lapponica baueri	I Red	10	-12	Endemic
Barn Swallow	Hirundo rustica	II Red	12	-20	<25%
Black Guillemot	Cepphus grylle	I Red	10	20	<25%
Black Oystercatcher	Haematopus bachmani	III Orange	0	11	25-74%
Black Swift	Cypseloides niger	I Red	6	11	<25%
Black-Backed Woodpecker	Picoides arcticus	IV Yellow	0	-18	<25%
Black-Bellied Plover	Pluvialis squatarola	IV Yellow	0	-20	Unknown
Black-Capped Chickadee	Poecile atricapillus	VI Blue	-6	-38	<25%
Black-Footed Albatross	Phoebastria nigripes	V Blue	6	-14	25-74%
Black-Legged Kittiwake	Rissa tridactyla	II Red	5	-20	25-74%
Blackpoll Warbler	Setophaga striata	II Red	10	-36	<25%
Bluethroat	Luscinia svecica	IV Yellow	0	-32	<25%
Bohemian Waxwing	Bombycilla garrulus	II Red	6	-28	<25%
Boreal Chickadee	Poecile hudsonicus	VI Blue	-6	-35	<25%
Brambling	Fringilla montifringilla	III Orange	0	16	<25%
Bristle-Thighed Curlew	Numenius tahitiensis	IV Yellow	0	-22	≥75%
Brown Creeper	Certhia americana	IV Yellow	0	-26	<25%
Brown Creeper (alascensis)	Certhia americana alascensis	III Orange	0	-16	Endemic
Buff-Breasted Sandpiper	Calidris subruficollis	I Red	12	-12	<25%
Buller's Shearwater	Ardenna bulleri	III Orange	0	-13	<25%
Canada Jay	Perisoreus canadensis	II Red	6	-38	<25%
Cassin's Auklet	Ptychoramphus aleuticus	VI Blue	4	-22	<25%
Cedar Waxwing	Bombycilla cedrorum	II Red	1	-35.5	<25%
Chestnut-Backed Chickadee	Poecile rufescens	VI Blue	-6	-26	25-74%
Common Murre	Uria aalge	V Blue	-11	-10	<25%
Common Raven (kamtschaticus)	Corvus corax kamtschaticus	IV Yellow	0	-18	<25%
Dark-Eyed Junco	Junco hyemalis	VI Blue	-6	-36	25-74%
Dunlin	Calidris alpina	II Red	5	-30	25-74%
Dunlin, Arctic	Calidris alpina arcticola	I Red	16	-16	≥75%
Dunlin, Pacific	Calidris alpina pacifica	V Blue	-11	-16	Endemic
Fork-Tailed Storm-Petrel (furcatus)	Hydrobates furcatus furcatus	V Blue	4	-14	≥75%
Fork-Tailed Storm-Petrel (plumbeus)	Hydrobates furcatus plumbeus	IV Yellow	0	-28	<25%
Fox Sparrow	Passerella iliaca	VI Blue	-6	-38	25-74%
Fox Sparrow, Chilkat Sooty	Passerella iliaca chilcatensis	IV Yellow	0	-20	Endemic
Fox Sparrow, Kodiak	Passerella iliaca insularis	III Orange	0	-8	Endemic
Fox Sparrow, Shumagin	Passerella iliaca unalaschcensis	IV Yellow	0	-20	Endemic
Fox Sparrow, Townsend's	Passerella iliaca townsendi	VI Blue	-6	-20	≥75%
Fox Sparrow, Valdez	Passerella iliaca sinuosa	IV Yellow	0	-20	Endemic
Fox Sparrow, Yakutat	Passerella iliaca annectens	III Orange	0	-14	Endemic
Glaucous Gull	Larus hyperboreus	VI Blue	-10	-32	25-74%
Glaucous-Winged Gull	Larus glaucescens	IV Yellow	0	-29	25-74%
Golden-Crowned Kinglet	Regulus satrapa	IV Yellow	0	-25	<25%
Golden-Crowned Sparrow	Zonotrichia atricapilla	IV Yellow	0	-38	≥75%
Gray-Cheeked Thrush	Catharus minimus	II Red	6	-44	25-74%
Gray-Crowned Rosy-Finch	Leucosticte tephrocotis	IV Yellow	0	-20	Unknown
Gray-Headed Chickadee (lathami)	Poecile cinctus lathami	II Red	12	-20	Unknown
Gray-Tailed Tattler	Tringa brevipes	III Orange	0	-5	<25%
Great Gray Owl	Strix nebulosa	IV Yellow	0	-20	<25%
Greater Yellowlegs	Tringa melanoleuca	IV Yellow	0	-36	25-74%
Hermit Thrush	Catharus guttatus	VI Blue	-11	-39	<25%
Herring Gull	Larus argentatus	III Orange	0	-10	<25%
Horned Lark	Eremophila alpestris	II Red	6	-28	<25%
Horned Puffin	Fratercula corniculata	IV Yellow	0	-22	≥75%
Iceland Gull (Includes Thayer's)	Larus glaucoides	III Orange	0	-5	Unknown
Ivory Gull	Pagophila eburnea	I Red	10	-6	<25%
Killdeer	Charadrius vociferus	II Red	6	-20	<25%
Kittlitz's Murrelet	Brachyramphus brevirostris	VI Blue	-3	-26	25-74%
Lapland Longspur	Calcarius lapponicus	II Red	6	-38	Unknown
Laysan Albatross	Phoebastria immutabilis	V Blue	4	-14	25-74%
Leach's Storm-Petrel (leucorhous)	Hydrobates leucorhous leucorhous	II Red	0	-26	25-74%
Least Sandpiper	Calidris minutilla	II Red	6	-33	25-74%
Lesser Yellowlegs	Tringa flavipes	II Red	10	-36	25-74%
Long-Billed Dowitcher	Limnodromus scolopaceus	IV Yellow	0	-36	Unknown
Long-Tailed Jaeger	Stercorarius longicaudus	III Orange	0	-16	<25%
Macgillivray's Warbler	Geothlypis tolmiei	III Orange	0	-9	<25%
Marbled Godwit (beringiae)	Limosa fedoa beringiae	III Orange	0	4	Endemic
Marbled Murrelet	Brachyramphus marmoratus	VI Blue	-5	-34	≥75%
Mckay's Bunting	Plectrophenax hyperboreus	III Orange	0	-2	Endemic
Mottled Petrel	Pterodroma inexpectata	IV Yellow	0	-26.5	<25%
Northern Fulmar	Fulmarus glacialis	I Red	1	10	<25%
Northern Hawk-Owl	Surnia ulula	IV Yellow	0	-22	<25%
Northern Shrike	Lanius borealis	II Red	6	-26	25-74%
Northern Wheatear	Oenanthe oenanthe	IV Yellow	0	-28	<25%
Olive-Sided Flycatcher	Contopus cooperi	II Red	16	-32	<25%
Orange-Crowned Warbler	Leiothlypis celata	IV Yellow	0	-31	25-74%
Pacific Golden-Plover	Pluvialis fulva	IV Yellow	0	-30	<25%
Pacific Wren	Troglodytes pacificus	IV Yellow	0	-36	25-74%
Pacific Wren, Attu	Troglodytes pacificus meligerus	III Orange	0	8	Endemic
Pacific Wren, Kiska	Troglodytes pacificus kiskensis	III Orange	0	0	Endemic
Pacific Wren, Kodiak	Troglodytes pacificus helleri	III Orange	0	-14	Endemic
Pacific Wren, Pribilof	Troglodytes pacificus alascensis	III Orange	0	10	Endemic
Pacific Wren, Semidi	Troglodytes pacificus semidiensis	III Orange	0	12	Endemic
Parakeet Auklet	Aethia psittacula	IV Yellow	0	-28	25-74%
Parasitic Jaeger	Stercorarius parasiticus	IV Yellow	0	-27.2	Unknown
Pectoral Sandpiper	Calidris melanotos	II Red	10	-30	25-74%
Pelagic Cormorant	Urile pelagicus	IV Yellow	0	-17	25-74%
Pigeon Guillemot	Cepphus columba	II Red	8	-34	25-74%
Pine Grosbeak	Pinicola enucleator	VI Blue	-6	-44	<25%
Pine Siskin	Spinus pinus	VI Blue	-6	-36	<25%
Pink-Footed Shearwater	Puffinus creatopus	III Orange	0	-11	<25%
Pomarine Jaeger	Stercorarius pomarinus	III Orange	0	0	<25%
Red Crossbill	Loxia curvirostra	IV Yellow	0	-32	<25%
Red Knot, Pacific	Calidris canutus roselaari	I Red	6	2	25-74%
Red Phalarope	Phalaropus fulicarius	II Red	6	-36	25-74%
Red-Breasted Sapsucker	Sphyrapicus ruber	VI Blue	-10	-19	25-74%
Red-Faced Cormorant	Urile urile	I Red	6	-11	Unknown
Red-Legged Kittiwake	Rissa brevirostris	V Blue	-3	4	≥75%
Red-Necked Phalarope	Phalaropus lobatus	II Red	6	-33	25-74%
Red-Necked Stint	Calidris ruficollis	III Orange	0	2	<25%
Red-Throated Loon	Gavia stellata	II Red	6	-22	<25%
Red-Throated Pipit	Anthus cervinus	III Orange	0	2	<25%
Red-Winged Blackbird	Agelaius phoeniceus	II Red	6	-20	<25%
Redpoll	Acanthis flammea	II Red	6	-38	<25%
Rock Ptarmigan, Evermann's	Lagopus muta evermanni	I Red	12	-11	Endemic
Rock Ptarmigan, Townsend's	Lagopus muta townsendi	III Orange	0	1	Endemic
Rock Ptarmigan, Turner's	Lagopus muta atkhensis	III Orange	0	11	Endemic
Rock Sandpiper, Aleutian	Calidris ptilocnemis couesi	IV Yellow	0	-24	Endemic
Rock Sandpiper, Bering Sea	Calidris ptilocnemis tschuktschorum	IV Yellow	0	-24	≥75%
Rock Sandpiper, Pribilof	Calidris ptilocnemis ptilocnemis	III Orange	0	4	Endemic
Ross's Gull	Rhodostethia rosea	IV Yellow	0	-38.2	≥75%
Ruby-Crowned Kinglet (calendula)	Corthylio calendula calendula	IV Yellow	0	-32	<25%
Ruby-Crowned Kinglet (grinnelli)	Corthylio calendula grinnelli	VI Blue	-6	-20	25-74%
Ruddy Turnstone	Arenaria interpres	IV Yellow	0	-34	<25%
Rufous Hummingbird	Selasphorus rufus	II Red	10	-24	<25%
Rusty Blackbird	Euphagus carolinus	VI Blue	-11	-38	<25%
Sabine's Gull	Xema sabini	VI Blue	-10	-32	<25%
Sanderling	Calidris alba	III Orange	0	-8	<25%
Savannah Sparrow	Passerculus sandwichensis	II Red	6	-38	<25%
Semipalmated Sandpiper	Calidris pusilla	VI Blue	-6	-40	<25%
Short-Billed Dowitcher (caurinus)	Limnodromus griseus caurinus	II Red	6	-36	≥75%
Short-Billed Gull	Larus brachyrhynchus	IV Yellow	0	-34	25-74%
Short-Tailed Shearwater	Puffinus tenuirostris	II Red	6	-30	Unknown
Slaty-Backed Gull	Larus schistisagus	III Orange	0	20	<25%
Smith's Longspur	Calcarius pictus	IV Yellow	0	-26	<25%
Snow Bunting	Plectrophenax nivalis	II Red	6	-36	<25%
Snow Bunting (townsendi)	Plectrophenax nivalis townsendi	IV Yellow	0	-18	≥75%
Solitary Sandpiper (cinnamomea)	Tringa solitaria cinnamomea	VI Blue	3	-24	≥75%
Song Sparrow, Aleutian	Melospiza melodia sanaka	III Orange	0	-14	Endemic
Song Sparrow, Bischoff	Melospiza melodia insignis	IV Yellow	0	-20	Unknown
Song Sparrow, Giant	Melospiza melodia maxima	IV Yellow	0	-20	Endemic
Song Sparrow, Kenai	Melospiza melodia kenaiensis	III Orange	0	-14	Endemic
Song Sparrow, Sooty	Melospiza melodia rufina	IV Yellow	0	-20	≥75%
Song Sparrow, Yakutat	Melospiza melodia caurina	III Orange	0	-14	Unknown
Sooty Shearwater	Puffinus griseus	II Red	6	-26	<25%
Spotted Sandpiper	Actitis macularius	VI Blue	-6	-37	25-74%
Spruce Grouse	Canachites canadensis	II Red	0	-32	<25%
Stilt Sandpiper	Calidris himantopus	II Red	6	-24	<25%
Surfbird	Calidris virgata	IV Yellow	0	-17	≥75%
Thick-Billed Murre	Uria lomvia	V Blue	-11	-10	25-74%
Townsend'S Warbler	Setophaga townsendi	VI Blue	-6	-30	25-74%
Tree Swallow	Tachycineta bicolor	II Red	16	-32	<25%
Tufted Puffin	Fratercula cirrhata	IV Yellow	0	-22	≥75%
Upland Sandpiper	Bartramia longicauda	IV Yellow	0	-30	<25%
Varied Thrush	Ixoreus naevius	VI Blue	-6	-35	25-74%
Vaux's Swift	Chaetura vauxi	I Red	6	6	<25%
Violet-Green Swallow	Tachycineta thalassina	IV Yellow	0	-44	<25%
Wandering Tattler	Tringa incana	IV Yellow	0	-24	25-74%
Western Sandpiper	Calidris mauri	II Red	6	-24	≥75%
Western Wood-Pewee	Contopus sordidulus	II Red	10	-30	<25%
Whimbrel	Numenius phaeopus	IV Yellow	0	-36	25-74%
Whiskered Auklet	Aethia pygmaea	V Blue	2	-16	≥75%
White-Crowned Sparrow	Zonotrichia leucophrys	II Red	1	-24	25-74%
Willow Ptarmigan	Lagopus lagopus	II Red	5	-32	<25%
Wilson's Snipe	Gallinago delicata	IV Yellow	0	-36	<25%
Wilson's Warbler	Cardellina pusilla	IV Yellow	0	-32	25-74%
Wood Sandpiper	Tringa glareola	III Orange	0	-1	<25%
Yellow-Billed Loon	Gavia adamsii	I Red	6	6	<25%
Yellow-Rumped Warbler	Setophaga coronata	IV Yellow	0	-39	<25%

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