Ethological Studies of the Budgerigar (Melopsittacus Undulatus): Non-Reproductive Behavior

摘要: Melopsittacus undulatus, a member of the parrot family Psittacidae, sub-family Psittacinae, is colonial nomadic species inhabiting dry grasslands Australia. Only domesticated strains were studied and information concerning general biology included. Non-reproductive behavior (maintenance agonistic activities) are described analysed with respect to function, causation biological significance. Budgerigars perform maintenance activity (scratching lateral crissum) never reported for any other bird. Most activities closely parallel those another genus Agapornis. few stereotyped behaviors. This may be correlated relatively little physical injury involved in settling disputes by overt fights involving bills occasionally feet. Females seem generally more aggressive than males, however sex differences quantitative nature only. Feather postures crown throat attempts made correlate these underlying motivations. Data from objective "ranking" behaviors indicate that functions appear causation.