Questions of identification

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Dmitry Goncharov
Posts: 50
Joined: Fri Jan 11, 2013 10:16 pm

Questions of identification

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.
Attachments
LBBG 1.jpg
Photo 5
LBBG 1.jpg (727.5 KiB) Viewed 3076 times
LBBG 1.1.jpg
Photo 1
LBBG 1.1.jpg (315.86 KiB) Viewed 3873 times
LBBG 1.2.jpg
Photo 2
LBBG 1.2.jpg (291.82 KiB) Viewed 3873 times
LBBG 1.3.jpg
Photo 3
LBBG 1.3.jpg (373.67 KiB) Viewed 3873 times
LBBG 1.4.jpg
Photo 4
LBBG 1.4.jpg (435.99 KiB) Viewed 3873 times
Last edited by Dmitry Goncharov on Mon Oct 27, 2014 9:57 pm, edited 6 times in total.

Dmitry Goncharov
Posts: 50
Joined: Fri Jan 11, 2013 10:16 pm

Re: Questions of identification

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

.
Last edited by Dmitry Goncharov on Mon Sep 22, 2014 8:52 pm, edited 4 times in total.

adriaens
Posts: 226
Joined: Sun Sep 27, 2009 9:24 pm

Re: Questions of identification

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

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

Dmitry Goncharov
Posts: 50
Joined: Fri Jan 11, 2013 10:16 pm

Re: Questions of identification

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.
Attachments
Photo 1.jpg
1
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Photo 2.jpg
2
Photo 2.jpg (126.13 KiB) Viewed 3823 times
Photo 3.jpg
3
Photo 3.jpg (601.25 KiB) Viewed 3823 times
Photo 4.jpg
4
Photo 4.jpg (484.94 KiB) Viewed 3823 times
Last edited by Dmitry Goncharov on Sat Aug 02, 2014 9:51 pm, edited 1 time in total.

adriaens
Posts: 226
Joined: Sun Sep 27, 2009 9:24 pm

Re: Questions of identification

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
Posts: 50
Joined: Fri Jan 11, 2013 10:16 pm

Re: Questions of identification

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.
Attachments
LBBG .jpg
intermedius?
LBBG .jpg (315.26 KiB) Viewed 3068 times


Last bumped by Dmitry Goncharov on Fri Nov 25, 2016 8:14 pm.

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