Species of Greatest Conservation Need By Taxon
Bird
| Scientific Name | Common Name | RSGCN Concern Level |
|---|---|---|
| Pheucticus ludovicianus | Rose-breasted Grosbeak | |
| Sterna dougallii | Roseate Tern | Very High |
| Buteo lagopus | Rough-legged Hawk | |
| Thalasseus maximus | Royal Tern | |
| Regulus calendula | Ruby-crowned Kinglet | |
| Oxyura jamaicensis | Ruddy Duck | |
| Arenaria interpres | Ruddy Turnstone | |
| Bonasa umbellus | Ruffed Grouse | High |
| Euphagus carolinus | Rusty Blackbird | Moderate |
| Ammodramus caudacutus | Saltmarsh Sparrow | |
| Calidris alba | Sanderling | |
| Thalasseus sandvicensis | Sandwich Tern | |
| Passerculus sandwichensis | Savannah Sparrow | |
| Piranga olivacea | Scarlet Tanager | |
| Ammodramus maritimus | Seaside Sparrow | |
| Cistothorus platensis | Sedge Wren | |
| Charadrius semipalmatus | Semipalmated Plover | |
| Calidris pusilla | Semipalmated Sandpiper | |
| Accipiter striatus | Sharp-shinned Hawk | |
| Limnodromus griseus | Short-billed Dowitcher | |
| Asio flammeus | Short-eared Owl | |
| Plectrophenax nivalis | Snow Bunting | |
| Egretta thula | Snowy Egret | Moderate |
| Tringa solitaria | Solitary Sandpiper | |
| Puffinus griseus | Sooty Shearwater | |
| Porzana carolina | Sora | |
| Actitis macularius | Spotted Sandpiper | |
| Falcipennis canadensis | Spruce Grouse | |
| Piranga rubra | Summer Tanager | |
| Melanitta perspicillata | Surf Scoter | |
| Catharus ustulatus | Swainson's Thrush | |
| Limnothlypis swainsonii | Swainson's Warbler | |
| Oreothlypis peregrina | Tennessee Warbler | |
| Uria lomvia | Thick-billed murre | |
| Tachycineta bicolor | Tree Swallow | |
| Egretta tricolor | Tricolored Heron | High |
| Cygnus columbianus | Tundra Swan | |
| Bartramia longicauda | Upland Sandpiper | High |
| Catharus fuscescens | Veery | Moderate |
| Pooecetes gramineus | Vesper Sparrow | High |
| Rallus limicola | Virginia Rail | |
| Vireo gilvus | Warbling Vireo | |
| Setophaga virens waynei | Wayne's Black-throated Green Warbler | |
| Numenius phaeopus | Whimbrel | High |
| Vireo griseus | White-eyed Vireo | |
| Pelagodroma marina | White-faced Storm-Petrel | |
| Calidris fuscicollis | White-rumped Sandpiper | |
| Zonotrichia albicollis | White-throated Sparrow | |
| Loxia leucoptera | White-winged Crossbill | |
| Melanitta fusca | White-winged Scoter |