Some vocalisations of the Grey Falcon 'Falco hypoleucos'

Sound-recordings of some calls of the Grey Falcon 'Falco hypoleucos' (adult cackle calls, juvenile begging whines) are described and presented as sound spectrograms, and compared with some equivalent calls of the Peregrine Falcon 'F. peregrinus' (adult female cackle, juvenile beg...

Full description

Bibliographic Details
Main Authors: Baylis, T, van Gessel, F W, Debus, Steve J S, School of Environmental and Rural Science
Format: Article in Journal/Newspaper
Language:English
Published: Australian Bird Study Association Inc 2015
Subjects:
Animal Behaviour
Animal Developmental and Reproductive Biology
peregrine falcon
Online Access:https://hdl.handle.net/1959.11/19788
https://rune.une.edu.au/web/retrieve/160d5285-6720-4ec1-a5b2-c6e9732e5a12
Description
Summary:Sound-recordings of some calls of the Grey Falcon 'Falco hypoleucos' (adult cackle calls, juvenile begging whines) are described and presented as sound spectrograms, and compared with some equivalent calls of the Peregrine Falcon 'F. peregrinus' (adult female cackle, juvenile begging whine, probable juvenile cackle). The Grey Falcon cackle calls are similar to those of the Peregrine, though variously softer and clearer, more 'squeaky' and/or more guttural (the Peregrine cackles being more strident and whining). Grey Falcon juvenile begging calls are more falsetto than those of the Peregrine. Fundamental frequencies differ slightly (Grey Falcon adult female cackle calls at ~700 Hz, Peregrine at ~1 kHz for juvenile begging calls, ~2 kHz for adult female cackle calls). The vocal data are consistent with the phylogenetic position of the Grey Falcon as basal to the Peregrine and 'great falcon' groups.

Similar Items