1cy gull - what species?

RSNaarhus · Post by **RSNaarhus** » Fri Sep 16, 2011 9:58 pm

Hello

This gull I photographed at Hirtshals, Northern Jutland, Denmark, 14/9-2011.

Any comments on the ID of the gull would be appreciated.

Best wishes, Rune

lou bertalan · Post by **lou bertalan** » Sat Sep 17, 2011 8:05 am

hi rune,

looks like stemming from one of the polish or latvian caspian gull colonies. the bird is quite classic but slightly late in scap moult indicating a more northern origin like e.g. this from 11.09. finland: http://www.tarsiger.com/images/hytpe/11 ... 6P9436.JPG. of course it would be hard to exclude an argentatus parent or grandparent but imo it can go as a pure bird.

cheers

lou

RSNaarhus · Post by **RSNaarhus** » Sat Sep 17, 2011 8:08 pm

Hi Lou

Thanks

So you think that the underwings are within the variation of Caspian Gull?

Best wishes, Rune

lou bertalan · Post by **lou bertalan** » Sat Sep 17, 2011 8:16 pm

definitely! caspians with dark underwings are the rule e.g. in danube delta. have a look at the birds from 2. and 4.09.2010: http://lou.bertalan.de/gulls/m_grp.php? ... nans%201cy

JanJ · Post by **JanJ** » Sat Sep 17, 2011 9:59 pm

Somehow not a pure argentatus - or cachinnans for that matter. In flight it seems to have a michahellis tail pattern and the inner primaries shows a pattern similar to michahellis or cachinnans.
Without going in to all the detailes - why not a arg. x cach.

JanJ

michal rycak · Post by **michal rycak** » Mon Sep 19, 2011 9:33 am

I can agree with Jan. Bird very similar to these juv. ringed in mixed colony (arg. x cach), which in my opinion really can be a hybrid of Lar arg & Lar cach.

Michal

oskarn · Post by **oskarn** » Mon Sep 19, 2011 4:27 pm

For me, this bird is a Herring Gull. A species in which all the shown features fits.

RSNaarhus · Post by **RSNaarhus** » Mon Sep 19, 2011 8:05 pm

Two more pictures taken by Søren Kristoffersen ca be seen here http://www.pbase.com/nature_pix/image/138212447 and here http://www.pbase.com/nature_pix/image/138212450.

Rune

Ronald Klein · Post by **Ronald Klein** » Fri Oct 21, 2011 1:45 pm

I am sure, the Hirtshals-gull is an Hybrid HG x CP. The fresh tertial-pattern (dark with broad pale top) is a typical cach-feature. But shape and quite dark underwing belongs more to HG.

I hate this birds. Next year I will personally try to get more information in the Lausitz mixed colony. The local ringer Heiko Michaelis (sic!) calculates 60% pure cach, rest HG and hybrides, only a few YLG. 15 year ago the majority were HG with some CG and YLG.

Hans Larsson · Post by **Hans Larsson** » Tue Nov 22, 2011 9:44 pm

I agree with Oskar; why not a HG?

www.gull-research.org

1cy gull - what species?

Re: 1cy gull - what species?

Re: 1cy gull - what species?

Re: 1cy gull - what species?

Re: 1cy gull - what species?

Re: 1cy gull - what species?

Re: 1cy gull - what species?

Re: 1cy gull - what species?

Re: 1cy gull - what species?

Re: 1cy gull - what species?