Colymbus glacialis. Great Northern Diver.
Public domain scan - Bird, 19th-century zoological illustration print, free to use, no copyright restrictions image - Picryl description
Colymbus septentrionalis. Red-throated Diver.
Public domain scan - Bird, 19th-century zoological illustration print, free to use, no copyright restrictions image - Picryl description
Black-throated Diver. 1. Male. 2. Female. 3. Young in October.
Public domain scan of print / book page depicting birds, ornithology, free to use, no copyright restrictions image - Picryl description
Red-throated Diver. 1. Male Summer Plumage. 2. do Winter. 3. Female. 4...
Public domain scan of print / book page depicting birds, ornithology, free to use, no copyright restrictions image - Picryl description
Great North Diver. -- Loon. 1. Adult. 2. Young in Winter.
Public domain scan - Bird, 19th-century zoological illustration print, free to use, no copyright restrictions image - Picryl description
Colymbus arcticus. Black-throated Diver.
Public domain scan - Bird, 19th-century zoological illustration print, free to use, no copyright restrictions image - Picryl description