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Bald Eagle, illustration from a published book
Banana, water lily, photograph from the Bulletin of the Department of Agriculture
Banana, water lily, range of, diagram from a book
Barn Swallow, food of young and adults, illustration from the Yearbook of the Department of Agriculture
Bird map of Minnesota, printed map from the Review of the Ornithology of Minnesota
Black and white Warbler, male and female, illustration from Frank M. Chapman, "The Warblers of North America"
Blackbird, Crow, Grackle, food diagrams from the Yearbook of the Department of Agriculture
Black-capped Chickadee at hole in tree
Black-capped Chickadees, four young and one adult
Black-capped Chickadees, four young and one adult
Black-capped Chickadees, four young and one adult
Black-capped Chickadee, winter picture
Blackpoll Warbler, male and female, image from Frank M. Chapman, "The Warblers of North America"
Black Tern, adult
Black Tern, adult
Black Tern, adult at nest
Bluebird, food diagram, old and young
Blue Jay, food diagram
Blue Jay, food diagram, vegetable and animal
Bobolink, diagram, animal and vegetable