Life histories of North American woodpeckers

by Arthur Cleveland Bent

Allen, Arthur Augustus, and Kellogg, P. Paul.

1937. Recent observations on the ivory-billed woodpecker. Auk, vol. 54, pp. 164-184.

Allen, Joel Asaph.

1892. The North American species of the genus Colaptes, considered with special reference to the relationships of C. auratus and C. cafer. Bull. Amer. Mus. Nat. Hist., vol. 4, pp. 21-44.

Allert, Oscar Paul.

1934. Flicker kills young robins. Iowa Bird Life, vol. 4, p. 20.

American Ornithologists’ Union.

1910. Check-list of North American birds. Ed. 3.

1931. Check-list of North American birds. Ed. 4.

Anderson, Anders Harold.