Ecological roles of migratory and resident birds on Barro Colorado Island, PanamaSmithsonian Institution Press205–225
Willis, Edwin O. 1980. "Ecological roles of migratory and resident birds on Barro Colorado Island, Panama." In Migrant birds in the Neotropics: ecology, behavior and conservation. Keast, Allen and Morton, Eugene S., editors. 205–225. Washington D.C.: Smithsonian Institution Press.