TY - JOUR A1 - Dilger, W. C. T1 - Excerpts From: The Comparative Ethology of the African Parrot Genus Agapornis JF - Th. E. McGill (Ed.), Readings in Animal Behavior, New York etc. (Holt, Rinehart and Winston) 1965, pp. 511-531. Y1 - 1965 ER - TY - JOUR A1 - Dilger, W. C. T1 - Changes in Nest-Material Carrying Behavior of F1 Hybrids Between Agapornis roseicollis and A. personate fischeri During Three Years (Abstract) JF - Th. E. McGill (Ed.), Readings in Animal Behavior, New York etc. (Holt, Rinehart and Winston) 1965, pp. 532. Y1 - 1965 ER -