Elevation and the Morphology, Flight Energetics, and Foraging Ecology of Tropical Hummingbirds Feinsinger, Peter ; Colwell, Robert K. ; Terborgh, John ; Chaplin, Susan Budd Abstract Publication: American Naturalist Pub Date: April 1979 DOI: 10.1086/283408 Bibcode: 1979ANat..113..481F