What is the function of Channel-billed Cuckoo calling flights?

To: Birding Aus <>
Subject: What is the function of Channel-billed Cuckoo calling flights?
From: Laurie Knight <>
Date: Tue, 6 Dec 2011 06:09:14 +1000
Channel-bills are (apparently) a bit different from other cuckoos in the sense that they are most likely to be observed calling while in flight. In the last couple of weeks I have noticed groups of CBCs raising a racket. This morning I saw a group of five flying and calling together. I originally thought the calling flights might be territorial or associated with nest raiding, but I am now wondering if the calling flights play a role in "picking up" immature birds from their hosts and inducting them in CBC "culture".

Has anyone studied this aspect of CBC behaviour?

Regards, Laurie.

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