More on the Koel

[shorty via Canberrabirds <>]

"I don’t really see that there is a basis to think that is an interaction, unless there actually is a contact." I don't see why there is not.

 "Sure those theories are sort of plausible but is there any basis to even raise the theories?"  Any reason to not?

"Why do the adult males NOT bother the juveniles but ignore them?" Are you sure they ignore them? Evidence?

Shorty

On Sun, Jan 12, 2025 at 4:54 PM Philip Veerman via Canberrabirds <> wrote:

I don’t really see that there is a basis to think that is an interaction, unless there actually is a contact. It is a proximity. The adult Koel just happens to still be there  (either because of food availability or the chance to find new breeding chances (or both) and they are making normal adult calls. Sure those theories are sort of plausible but is there any basis to even raise the theories? Is there a question to be answered? It is fairly normal that they are just around in the same places anyway. Most years when I find juveniles, there are still adults nearby.

 

Actually I find the more curious question is the opposite. The alternative is that there is avoidance that might need explaining. Seeing as to us, juvenile Koels look so similar to adult females (smaller and different head colour) and that adult male and female Koels have such vigorous interactions, why do the adult males NOT bother the juveniles but ignore them? How to they recognise the disinterest? I guess because adult females respond to adult males (especially vocally) but juveniles do not.

 

Philip

 

From: Canberrabirds [ On Behalf Of jandaholland--- via Canberrabirds
Sent: Sunday, 12 January, 2025 3:00 PM
To: 'shorty'; 'Canberra birds'
Subject: Re: [Canberrabirds] More on the Koel

 

Many thanks Shorty, for your very interesting observation/

 

The possible reasons for Koel adult/fledgling interactions are not clear, with at least 2 theories being raised in the past, 1) to imprint the call or 2) to escort the fledglings N.  Yours giving the ko-el call (which I heard up to Christmas but not on my return) is very interesting, and perhaps lends some support for the former, since early January would seem too early for them to migrate.

 

My last summary (with back references) of adult/fledgling interactions is in Section 5.4 of CBN 45, 293-310 (2020) for the 2019-2020 season.  I note John Harris’ adult was giving the wirra wirra call.  There were very few such observations in the bumper 2020-2021 season [Section 4.8 of CBN 46, 119-144 (2021)].

 

Jack Holland

 

From: Canberrabirds <> On Behalf Of shorty via Canberrabirds
Sent: Sunday, 12 January 2025 12:52 PM
To: Canberra birds <>
Subject: [Canberrabirds] More on the Koel

 

Today I have had both the juvenile present and also an adult male calling. I took a recording where you can hear the juvenile beginning and the adult calling, they were about 20 metres apart in separate trees. Recording is on my checklist.

 

https://ebird.org/checklist/S208936407

 

Shorty

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