arrested moult in cachinnans

[marsmuusse]

I received these images from Amir, a bird photographed 23 September 2011 in Ashdod, Israel.
I can't remember seen cachinnans birds showing arrested moult, but maybe I missed something.
Anybody seen and documented this?

Cheers, Mars

[Hans Larsson]

I think that primary pattern (incl. faint dark shafts on gc) points towards barabensis. Is it possible to exclude this possibility? It would be much of a relief..

[JanJ]

I will stir the pot further and claim barabensis Primary pattern with obvius mark on p4 is a good marker for this 'LBBG'
Then again, we are supposed to be extremely carefull about these things, rightfully.

JanJ

[hieraaetus]

Hi Guys,

Here are some pictures of a cachinnans/barabensis type gulls from South-east Kazakhstan (May-June, 2011.). Among 40 adult gulls black on P4 was quite common (in one case even up to P1!), but the extent of the black and the primary pattern looks good for cachinnans imo.
Any thoughts on that?

Cheers,

Gabor

[lou bertalan]

wow, these are spectacular pics of what i'd call the "eastern cachinnans" type with a lot of black down but on the same time long grey tongues which is not so typical for barabensis?
how much intergradation between these two taxa? large p10 mirror placed distally and the deep "bays" of white primary bases into black furthermore serve for a cachi-look.

as for the initial bird (the one from ashdod) it looks indeed more barabensis-like with that large black field on wingtip and shortish legs but upright stance.

lou

[hieraaetus]

wow, these are spectacular pics of what i'd call the "eastern cachinnans" type with a lot of black down but on the same time long grey tongues which is not so typical for barabensis?
how much intergradation between these two taxa? large p10 mirror placed distally and the deep "bays" of white primary bases into black furthermore serve for a cachi-look.

as for the initial bird (the one from ashdod) it looks indeed more barabensis-like with that large black field on wingtip and shortish legs but upright stance.

lou

Hi Lou,

I have some more pix of more birds from the very same place if you interested in studying them.

Best wishes,

Gabor

ps: these gulls were probably failed breeders or floaters because they were hanging around there all the time. By range they should be cachinnans, right? but who knows with gulls..

[JanJ]

Very nice pic from Gabor and again just goes to show the minefield we are caught in.

Some other examples, shown before:

http://www.elisanet.fi/antero.lindholm/ ... urals.html

http://www.elisanet.fi/antero.lindholm/ ... alzyn.html

And yes Gabor, we´d like to se some more!

JanJ

[lou bertalan]

szía gabor,

i'd subscribe to this idea: it would indeed be a good to load up as many as possible e.g. here: viewforum.php?f=11 (locations other - abroad) under a thread with the location in kazakhstan!

all the best,

lou

[hieraaetus]

szía gabor,

i'd subscribe to this idea: it would indeed be a good to load up as many as possible e.g. here: viewforum.php?f=11 (locations other - abroad) under a thread with the location in kazakhstan!

all the best,

lou

Alright Guys!

I will do that!

Cheers,

Gabor