Questions of identification

Dmitry Goncharov · Post by **Dmitry Goncharov** » Fri Jun 06, 2014 4:20 pm

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.

Dmitry Goncharov · Post by **Dmitry Goncharov** » Fri Jun 06, 2014 4:41 pm

adriaens · Post by **adriaens** » Tue Jun 24, 2014 10:24 am

Hi,
the second bird looks normal for (pure) cachinnans to me.

Dmitry Goncharov · Post by **Dmitry Goncharov** » Tue Jun 24, 2014 5:34 pm

Hello. I guess, a gull on the photos is a hybrid (cachinnans x argentatus).
I would be grateful for your opinion.
Dmitry.

adriaens · Post by **adriaens** » Wed Jun 25, 2014 1:00 pm

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'."

Dmitry Goncharov · Post by **Dmitry Goncharov** » Fri Nov 25, 2016 8:14 pm

Hello,
I think it is a pair of L. fuscus intermedius. I would be grateful for your opinion.
Dmitry.

www.gull-research.org

Questions of identification

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