www.gull-research.org

A determination as chick mostly means nothing in these mixing colonies with hybridization. Best way is their identification later. Hi friends, Ronald, is Reddern nearly pure, because "founded by Caspians in the last 5 years", or strongly "mixed with hybridization"? If mixing: + few michahellis, or ...

Thanks again Lou, But as Ronald explained, Gräbendorfer See (Reddern) is the most recent and supposed pure. The mixed colony is Sedlitz. However, the following bird (Ouistreham 16/11/2014) could stem from this second dubious place... At first sight, it looks like a YLG (common at this date). But the...

Hi friends, any comment about the 1st bird above (05/09/14) ?

Hi, below is another probably good Caspian from Normandy (5/09, ringed in Reddern/D, 7/06/2013). The observer only asks for some comments before he sends his report to the regional Committee... I add a new "brochette" from yesterday in Dives-sur-Mer, Calvados (cheers again to Tony Le Hu Nghia). Two ...

the new guy looks perfect.

Thanks again Lou!

but as for 006P i'm quite sure it is not a pure cachinnans

A DNA testing would have been very relevant or instructive for this bird... (nearly 15 years old now: still alive ?!)

Bonsoir !

Hi, a new bird from last Sunday in Calvados, Normandy. A specially typical one for me (Gibbins's score = 17, indeed!?). Upper parts' moult very similar to http://gull-research.org/cachinnans/1cy/dn09082.html - 1 GC + 1 MC! However, this new Tony's bird has whiter head and longer legs: good boy! Even...

what many (including myself probably) would label Yellow-legged Gull michahellis, if not ringed as pullus. It's the most famous cachinnans of Poland Everybody here would have just seen a YLG in this bird (standing or flying) and not reacted at all (I assume) as before a CG. And without such a ring,...

sorry to answer again on the same topic. Quite the opposite, Lou, it's highly appreciated! 2 looks a bit like YLG indeed with its crisp pattern but you can't exclude a 2cy cachi with a bit bolder markings. In western France, the concern doesn't really lie in excluding a possible cachinnans when one...

Many thanks for your detailed reply, Lou. 11 + 13 J: the 'bird from 18.08' is indeed our 'problematic' bird (others come from GRO). I do think it's a pretty good cach (as Mars did, I assume), even if its bill, head and neck look rather short and thick while flying (any matter of angle?). But other p...

And foremost: what's your opinion about Tuesday's 5 unringed birds?
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Thanks for it!