Channel-billed Cuckoo aggregations

G’day

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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