The North American species of the genus Colaptes, considered with special reference to the relationships of C. auratus and C. cafer. Bulletin of the AMNH ; v. 4, article 2.

Allen, J. A. (Joel Asaph), 1838-1921.2005-10-062005-10-061892http://hdl.handle.net/2246/788p. 21-44, [1] folded leaf of plates : map ; 24 cm.Includes bibliographical references.2706526 bytesapplication/pdfen-USQH1 .A4 vol.4, art.2, 1892Colaptes auratus.Colaptes cafer.Hybridization.Colaptes -- Variation -- North America.Birds -- Variation -- North America.The North American species of the genus Colaptes, considered with special reference to the relationships of C. auratus and C. cafer. Bulletin of the AMNH ; v. 4, article 2.text