hey Tom,
I haven't got any images showing this nor have I seen any on-line.
But yes I have noticed it before in the field in very young birds, especially
up here. Due to being rather diligent in checking all marked birds closely for
any vagrants, I've seen this a number of times in juv Silver Gulls...
cheers,
martin cachard,
cairns
> Date: Mon, 17 Nov 2014 08:31:24 +1100
> From:
> To:
> Subject: [Birding-Aus] Silver Gull head-markings
>
> Wonder if anyone can help? At the weekend I went to Lake Tuchewop in
> Victoria to look for the Long-billed Dowitcher and arrived at the southern
> end of the lake on Saturday evening just before it got dark. Whilst
> searching for the wader I noticed an immature gull with a classic
> non-breeding head-pattern as a Black-headed Gull, (two small dark-patches)
> however the other birders present assured me that it was just a juvenile
> Silver Gull (....and it probably was!)
> I then realised that I've hardly bothered to look at juvenile Silver Gulls
> and never seen this feature in the past. Does anyone have imagery (or know
> of some web-links) of juvenile Silver Gull which show head-markings? All
> the ones that I've checked so far don't show any.
>
> Any assistance gratefully received,
>
> Tom
>
> --
> ********************************
> Tom
>
> Tarrant
>
> Hawthorn East 3123
> Victoria
>
> http://www.aviceda.org
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