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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

gulls (2 Viewers)

let's see if peter replys here: http://www.talk.gull-research.org/viewtopic.php?f=13&t=816

edit: he did :t:

a w-shaped p5 mark, some spiked extentions (bajonetts) on p6,7 and solid dark tertial centers should be looked for, as far as i understand. maybe bajonetts are not as developed in 3rd cycles as in adults.

Thanks for that Lou! No fun at all if it isn’t tricky! Hopefully I will get another chance to photograph the bird if it stays around, although I would need it coming to bread to get image close-ups like the Netherlands individual. Not at all sure I would agree that the Cornwall 3rd winter is less striking than the Dutch 3rd winter shown!
Colin
 
wow, two nice birds there, cris.
1st is one of the "incomplete 5-ers" (p5 mark doesn't extend on both webs) cachinnans
2nd should be a 2cy michahellis! but what a white underside!
 
it is a retarded 3rd cycle (-winter), whatever it is. peter should have a look at this. i can't remember having seen pics of such brown 3cy argenteus.

I thought it might be useful to show this heavy 3rd winter argentatus type (just an opinion no claim intended) several around the area at the moment along side of the retarded 3rd winter already discussed, if nothing other than to highlite the range.

Colin
 

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Argentatus x fuscus?

This bird in East Lothian today looks to me like a classic Herring x LBBG hybrid - any comments?

Geoff
 

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First winter Caspian Gull, UK 08 Dec 2012

If only the weather was always so obliging and the birds so easy to ID!
 

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looks like a yellowish legged herring gull to me, geoff.

I did consider a yellowish legged herring gull but thought that the darker shade of the upperparts would effectively exclude it. The mantle shade was equivalent to YLG (previous observers have logged it as a possible YLG) and the Herring Gulls that we see with this mantle shade typically show much reduced black on the wing tip. Another feature that I thought would point toward a hybrid is the wide tertial crescent.

Geoff
 
yes, i've noted the wide tertial crescent but couldn't consider it because in these photos any white strongly "eats" into the darker portions, so, if it was observed in the field as well and the mantle was slightly darker a hybrid can be considered. however, it has a black down to p6 only. maybe YLG x HG could as well be considered?
 
I did consider a yellowish legged herring gull but thought that the darker shade of the upperparts would effectively exclude it. The mantle shade was equivalent to YLG (previous observers have logged it as a possible YLG) and the Herring Gulls that we see with this mantle shade typically show much reduced black on the wing tip. Another feature that I thought would point toward a hybrid is the wide tertial crescent.

Geoff

the 4th photo does seem to show a much darker bird than the two Herrings next to it.

Neil - I had a very similar Caspian in Feb 2010 in Kent:

http://www.kentos.org.uk/recentsigntings/images/casp425-2-10.jpg

Superb looking birds.

Cheers, Andy.
 
Tineretului Park - December 15th 2012
 

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Last edited:
what a weirdo again!
not only has it a very short pp (like in some male caspians) but it's the first caspian with p8 mirrors that i see! and then the shape of right hand p6 mark!
this together with a strong p4 mark, and a strong p10 subterminal mark make it stand out of every normal cachinnans. might it be a hybrid - cachitatus comes to mind, a russian caligari mixture? wow.
 
From Today . Samsun , TURKEY.
 

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