Hi All,
Can you help us ID these birds. We always thought these to be all LBBG ssp. fuscus, but now I cannot belive that these could be the same ssp. Or maybe this variability is only caused by the abrasion o the feathers or small differences in moulting.
The pictures were taken near to the rubbish-heap of Debrecen, Hungary on 11/20/2010.
Thanks is advance,
Daniel Balla
LBBG, same ssp.?
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Theo Muusse
- Posts:409
- Joined:Fri Oct 02, 2009 6:24 pm
- Location:Dordrecht
Re: LBBG, same ssp.?
Welcome to the world of LBBG!
The pale bird with a few new upper scaps is, to me, a textbook fuscus.
Given the fact that both other birds are still fully juvenile on the scaps suggest that they are from the North too.
The darkest bird gives me a intermedius look, but with all 3 not ringed (I guess) it remains just a feeling.
If there were 3 fuscus together, you would suggest a ring, since Risto and mates do a hell of a job to catch them.
So, conclusion, 3 northern birds of which all may be fuscus and all may be intermedius...
Theo
The pale bird with a few new upper scaps is, to me, a textbook fuscus.
Given the fact that both other birds are still fully juvenile on the scaps suggest that they are from the North too.
The darkest bird gives me a intermedius look, but with all 3 not ringed (I guess) it remains just a feeling.
If there were 3 fuscus together, you would suggest a ring, since Risto and mates do a hell of a job to catch them.
So, conclusion, 3 northern birds of which all may be fuscus and all may be intermedius...
Theo
Re: LBBG, same ssp.?
Thank you for your answer Theo. Unfortunately no one of them was ringed.
Daniel
Daniel
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vuelvepiedras
- Posts:56
- Joined:Tue Oct 13, 2009 7:28 pm
Re: LBBG, same ssp.?
Hello,
both gulls depicted represent the typical LBBg variability. I see thousands of LBBG every year, and none of them is equal.
It's supposed that retarded moult is a clue for a northern origin, but that issue is (up to date for me) not always proved, at least for winter birds in Spain, based on rings recoverings. Many 1cy/2cy birds ringed as intermedius shows a fairly average scapular and covert moult during winter. And, on the other hand, graellsii and (usually) dutch intergrade may have a retarded feather renovation.
Cheers!
Gabi
both gulls depicted represent the typical LBBg variability. I see thousands of LBBG every year, and none of them is equal.
It's supposed that retarded moult is a clue for a northern origin, but that issue is (up to date for me) not always proved, at least for winter birds in Spain, based on rings recoverings. Many 1cy/2cy birds ringed as intermedius shows a fairly average scapular and covert moult during winter. And, on the other hand, graellsii and (usually) dutch intergrade may have a retarded feather renovation.
Cheers!
Gabi