birding-aus

Cuckoos

To: 'Penny Brockman' <>, "" <>
Subject: Cuckoos
From: Stephen Ambrose <>
Date: Tue, 26 Dec 2017 20:51:28 +0000
We've had both Koel and Channel-billed chicks raised in our garden or our 
neighbour's garden in Ryde, NSW in the 14 years that we've been here. My 
impression is that both species can raise young in the same neighbourhood each 
year, but not necessarily every year.  For instance, the Channel-billed Cuckoo 
seems to be successful in parasitising a nest in our garden or neighbour's 
garden once every 3 years on average.  I suppose it comes down to the 
availability of nest hosts - if the cuckoos have successfully parasitised nests 
one year, then they may need to move to other locations the following year or 
two years to allow their local host population to build up again.

Kind regards,
Stephen

Stephen Ambrose
Ryde NSW


-----Original Message-----
From: Birding-Aus  On Behalf Of 
Penny Brockman
Sent: Tuesday, December 26, 2017 10:12 PM
To: 
Subject: Cuckoos

I don't think the Channel-bills have replaced the Koels, just given the latter 
something to complain about, which they were doing loudly over the weekend in 
Normanhurst as the Channel-bills cackled early morning.


On 23/12/2017 12:45 PM, Brian Fleming wrote:
> Some years ago the ABC did a short report on Channel-billed cuckoos
> spreading into Sydney and displacing the unwanted Currawongs.
>
>  Brian Fleming (who HEARD a Koel in an adjoining suburban garden in
> Ivanhoe some years ago).
>
>
> On 23/12/2017 6:08 AM, Geoff Ryan wrote:
>> I know why Judith. All the Koels are here at Yamba NSW but no
>> Channel-billed cuckoos.
>> Geoff
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