作者: Mark A. Jurisevic
DOI: 10.1071/MU99001
关键词:
摘要: Change in vocal structure during development was investigated in two large Australian passerines, a corvid, the Little Raven Corvus mellori and a corcoracid, the White-winged Chough Corcorax melanorhamphos. Begging calls in both species were harsh vocalisations covering a wide frequency range. The major ontogenetic change in begging call structure was in pulse duration. Little Raven begging calls increased in pulse duration with increasing age while White-winged Chough begging calls decreased in duration. In both species pulse …