Geoffrey,
If this was a Black-tailed Gull, then to have a pink-based bill and a dark
eye, it would have to be a young bird (they have pink bills between juvenile
and second-summer plumage, attaining a yellow-based bill and pale iris). But
a young BTG would have much more dark on the underparts than this bird.
Also, the bill is too small, along with the build of the bird. BTG is quite
a large, stocky bird.
I'd suggest that this bird was a 2nd-summer Silver Gull (juveniles have
black bills, so the dark tip is what is remaining from this as it moves
towards adult plumage). The dark markings around the head are a bit of a
mystery though.
Keep looking though!
All the best,
Graham
On 11/21/06, Geoffrey Dabb <> wrote:
In response to requests I have included images in a posting to the
canberrabirds group, which may be found, under today's date, at
http://bioacoustics.cse.unsw.edu.au/archives/html/canberrabirds
If you get that far, you may be interested in my related phalarope
experiences on the same visit, in that archive under 10 November. (In
that
little report, I wrongly referred to Ray as 'Ralph')
Geoffrey
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Dr. Graham Etherington
Brisbane,
Queensland, Australia
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