Introduction

The 354 species accounts on this website represent those we believe to have been correctly identified since 1950. A summary of our process can be found here.

Species Accounts

• Canada Goose / Branta canadensis
• Canada Jay / Perisoreus canadensis
• Canada Warbler / Cardellina canadensis
• Cape May Warbler / Setophaga tigrina
• Carolina Wren / Thryothorus ludovicianus
• Caspian Tern / Hydroprogne caspia
• Cassin's Sparrow / Peucaea cassinii
• Cave Swallow / Petrochelidon fulva
• Cedar Waxwing / Bombycilla cedrorum
• Cerulean Warbler / Setophaga cerulean
• Chestnut-sided Warbler / Setophaga pensylvanica
• Chimney Swift / Chaetura pelagica
• Chipping Sparrow / Spizella passerina
• Chuck-wills-widow / Antrostomus carolinensis
• Clapper Rail / Rallus crepitans
• Clay-colored Sparrow / Spizella pallida
• Cliff Swallow / Petrochelidon pyrrhonota
• Common Eider / Somateria mollissima
• Common Gallinule / Gallinula chloropus
• Common Goldeneye / Bucephala clangula
• Common Grackle / Quiscalus quiscula
• Common Loon / Gavia immer
• Common Merganser / Mergus merganser
• Common Murre / Uria aalge
• Common Nighthawk / Chordeiles minor
• Common Raven / Corvus corax
• Common Redpoll / Acanthis flammea
• Common Tern / Sterna hirundo
• Common Yellowthroat / Geothlypis trichas
• Connecticut Warbler / Oporornis agilis
• Cooper's Hawk / Accipiter cooperii
• Cory's Shearwater / Calonectris diomedea