![Competition for the Nectar of Centropogon valerii by the Hummingbird Colibri thalassinus and the Flower-Piercer Diglossa plumbea, and Its Evolutionary Implications]()
Competition for the Nectar of Centropogon valerii by the Hummingbird Colibri thalassinus and the Flower-Piercer Diglossa plumbea, and Its Evolutionary ImplicationsRobert K. Colwell, Burr J. Betts, Pille Bunnell, F. Lynn Carpenter and Peter Feinsinger · The Condor · 1974