It is reasonable to think that koels migrate south incrementally, looking for suitable territory as regards food and host presence. Later arrivals
are pushed further south as they move through occupied territory. Otherwise later arrivals would overfly vacant areas of suitable territory. This theory fits the successive reporting of arrivals from locations north to south. It would explain the appearance
of a wave of individuals in a particular location, like here. It also suggests increasing numbers of koels.
From: Canberrabirds <>
On Behalf Of Philip Veerman via Canberrabirds
Sent: Saturday, 5 October 2024 11:15 AM
To: 'calyptorhynchus' <>;
Subject: Re: [Canberrabirds] Koel
There is nothing at all to suggest that young Koels travel north with parents. The young Koels have zero connection to their parents. We can see that even here.
They are raised by foster parents and leave them as soon as the foster parents’ role is done. The parents have often left before the young are mature enough to start the journey. Even so, if young Koels had any connection to their parents it is even stranger
to think that they would hang around long enough to make the return journey months later.
In general with birds there is not a lot to suggest that young birds migrate specifically with parents. Some do, like some storks (or is it cranes) or both groups,
or very social birds that just maintain big collectives anyway…….
I also looked at HANAB book yesterday as Jack quoted, but then I have gone through the same exercise before as the question gets raised every couple of years.
Philip
From: Canberrabirds
On Behalf Of calyptorhynchus via Canberrabirds
Sent: Saturday, 5 October, 2024 10:07 AM
To:
Subject: Re: [Canberrabirds] Koel
If young birds travel north with parents, then I guess younger birds might travel south with older birds in the spring.
On Sat, 5 Oct 2024 at 8:13 am jandaholland--- via Canberrabirds <> wrote:
Thanks Brian, I’ve had a look through HANZAB online which only contains “Suggested that migrate singly, in pairs or in small groups”.
The references to this statement are quite old, but I am not aware of any more recent information, the main question that has come up in the past 10 years is “do adults travel together with juveniles (escort) on the outward migration?”.
Certainly, the reports of first Koels in at least 9 different locations (both N and S side) over the past 2 days (including 3 birds
in Rivett yesterday afternoon) would suggest they were all travelling at much the same time, though not necessarily very close together.
Jack Holland
With all these birds appearing at the same time, I wonder whether migrating Koels travel as a group then disperse at their destination.
On Oct 4, 2024, at 4:44 PM, jandaholland--- via Canberrabirds <>
wrote:
And certainly in W Rivett today too. After a brief set of “ko-els” this morning, one was ko-eling (with some short stops) there very
loudly for at least 25 minutes around 15:00, and again when walking dogs after 16:10, around which time I also heard at least 4 brief sets of the female “kek kek kek” call, and also briefly a few of the male’s alternative “whoas”, in one case answering the
female call. Jack Holland
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