Lindell,
It is likely
that the larger juvenile (3rd photo) is from the 1st
brood, the smaller young from a recent (the 2nd) brood (in the A.
Grebe broods can overlap, see my earlier message to Martin Butterfield?s question), and the pair may get
ready for a 3rd breeding attempt as the mating scene you have described indicates. It seems
the nest did not yet contain an egg.
It would be worth keeping an eye on this pair to see whether they will
produce another brood.
Michael Lenz
Sent: Sunday, January 16, 2011 9:17 PM
Subject: [canberrabirds] Namadgi Visitor Centre
This morning on the small dam behind the NVC were these Grebes.
There was a juvenile on it's own that appeared to be older than the
two juveniles still hanging out with the adult birds.
The family of four stayed near the nest amongst the reeds in the
centre when the next moment one of the adults (I presumed the female) got up on
to the nest, did some minor adjustments then nestled down then instantly the
male mounted the nest and her, making sure that there would be another
generation of Namadgi Grebes.
When it was over the female slipped into the water and ruffled up the water
around her for about 5 seconds.
An unusual chain of events to witness.
Lindell
--
Griffith
ACT
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