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Summary
Ward, D. 1986. Vocalizations and associated behaviour of Crested and Blackcollared Barbets. Ostrich 57: 129–137.
The Blackcollared Barbet has a complex antiphonal duet which is initiated by vocal and visual signalling between members of a pair. The Crested Barbet's duet is not synchronized and may consist of a variety of combinations of trilling and grating calls depending on a pair's repertoire. The response of both species to playback of their calls is described. Playback of Crested and Blackcollared Barbet calls attracted all “hole roosters” in the vicinity, regardless of phylogenetic relationship or song-type, indicating competition for roosting cavities.