Channel-billed Cuckoo aggregations

Subject: Channel-billed Cuckoo aggregations
From: Laurie Knight <>
Date: Mon, 11 Jan 2021 18:29:27 +1000

My most common CBC observation is a single bird calling in flight, with 
numerous instances of coordinated duos.  

A while back I came across a group of 4 hanging out in a eucalypt and I was 
struck by their similarity with hornbills.

This morning I saw a combination of 7 CBCs (6 in a bunch an another flying to 
join them). My question, is why would such a large group come together?  I can 
understand a pair doing a nest raid, and two pairs facing off over territory, 
but why would 7 come together?

Regards, Laurie
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