I think it is more likely to ensure "safety in numbers" especially
flight. A lone individual is more likely to be mobbed by a nest host
(currawong or magpie) or preyed upon by a predator (large raptor)
that is part of a flock. An individual calling as it takes flight
others to follow. Calling while in flight keeps individuals within a
close together, especially if they are flying at night.
Dr Stephen Ambrose
On Behalf Of Philip
Sent: Tuesday, 6 December 2011 2:56 PM
To: 'Birding Aus'
Subject: [Birding-Aus] What is the function of Channel-billed Cuckoo's
Interesting question. Presumably, like most migrant cuckoos they
social or sexual reasons when they arrive at their breeding areas.
don't think that is the question being asked. Which raises to me the
that yes they are cuckoos, but in their way of feeding they are
from most cuckoos. They are mainly fruit eaters. I would think that
a geographically concentrated food source, as distinct from the more
spread insect food source that most cuckoos use. So I propose (for
consideration, with no proof I hope you understand) that maybe it is
calling related to finding food - if they want to share it that is,
it provides a way to assemble in groups at places with abundant food.
-----Original Message-----From: birding-aus-
On Behalf Of Peter
Sent: Tuesday, 6 December 2011 8:29 AM To: 'Greg & Val Clancy';
Knight'; 'Birding Aus' Subject: Re: [Birding-Aus] What is the
What's the most CBCs you could expect to see in a flock? Do any
species fly in flocks like that?
-----Original Message-----> From:
On Behalf Of
Greg & Val Clancy > Sent: Tuesday, 6 December 2011 7:41 AM >
To: Laurie Knight; Birding Aus
Subject: Re: [Birding-Aus] What is the function of Channel-billed
As they call at all times of the breeding cycle I would think
suggestion that it is to 'pick up' immature birds would not
why they call in flight.
Dr Greg. P. Clancy
Ecologist and Wildlife Guide