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Questions of identification

Posted: Fri Jun 06, 2014 4:20 pm
by Dmitry Goncharov
Hello,
A female of a breeding LBBG pair was ringed this year (30.04.2014, Gatovo). It seems to me that this gull is L.f.heuglini,
but judging by a pale color of coverts (compared with intermedius) perhaps, the bird relates to L.f.graellsii. A male has a similar color.
I would like to know your opinion. Thanks in advance, Dmitry.

Re: Questions of identification

Posted: Fri Jun 06, 2014 4:41 pm
by Dmitry Goncharov
.

Re: Questions of identification

Posted: Tue Jun 24, 2014 10:24 am
by adriaens
Hi,
the second bird looks normal for (pure) cachinnans to me.

Re: Questions of identification

Posted: Tue Jun 24, 2014 5:34 pm
by Dmitry Goncharov
Hello. I guess, a gull on the photos is a hybrid (cachinnans x argentatus).
I would be grateful for your opinion.
Dmitry.

Re: Questions of identification

Posted: Wed Jun 25, 2014 1:00 pm
by adriaens
For iris colour, see Gibbins et al (2010).
An excerpt:
"Eye colour varies enormously in cachinnans: Jonsson (1998) suggested that c. 75% of adult cachinnans appear 'medium- to dark-eyed' in the field, whereas Liebers& Dierschke (1997) found that 48% of birds in one Ukrainian colony and 62% in another were 'pale-eyed'."

Re: Questions of identification

Posted: Fri Nov 25, 2016 8:14 pm
by Dmitry Goncharov
Hello,
I think it is a pair of L. fuscus intermedius. I would be grateful for your opinion.
Dmitry.