Search found 248 matches

by Ruud Altenburg
Mon Apr 18, 2011 7:23 pm
Forum: Herring Gull
Topic: advanced moult in 2cy tatus/teus
Replies: 3
Views: 1683

Re: advanced moult in 2cy tatus/teus

Theo I think you're right!
by Ruud Altenburg
Thu Apr 14, 2011 6:42 pm
Forum: Identification
Topic: Puzzling gull
Replies: 5
Views: 1340

Re: Puzzling gull

Fresh one indeed!
by Ruud Altenburg
Wed Apr 13, 2011 8:16 pm
Forum: Herring Gull
Topic: advanced moult in 2cy tatus/teus
Replies: 3
Views: 1683

Re: advanced moult in 2cy tatus/teus

Lousy long distance (200 m) shots but note replaced tertials and coverts on both sides. A YLG would be proud. Heemskerk, 11-04-11.
by Ruud Altenburg
Fri Apr 08, 2011 3:39 pm
Forum: Identification
Topic: Lesser Black-backed type in southern England
Replies: 7
Views: 1504

Re: Lesser Black-backed type in southern England

Second generation primaries never been recorded in ringed graellsii/intermedius in spring. Very occasionally you will find a graellsii/intermedius -like bird that has replaced a few inner primaries. We have just finished a paper for Dutch Birding about 2cy LBBGs, don't know when it will be published...
by Ruud Altenburg
Wed Apr 06, 2011 8:24 am
Forum: Identification
Topic: Lesser Black-backed type in southern England
Replies: 7
Views: 1504

Re: Lesser Black-backed type in southern England

A 2cy LBBG that has replaced all scapulars and the occasional covert. The primaries look pretty rounded for juvenile feathers!
by Ruud Altenburg
Thu Mar 31, 2011 9:58 am
Forum: Great Black-backed Gull
Topic: Quite advanced...
Replies: 0
Views: 1871

Quite advanced...

If the date really is correct, aren't we talking about an extremely early moulting bird here?
http://waarneming.nl/waarneming/view/53066327
by Ruud Altenburg
Sun Feb 27, 2011 4:47 pm
Forum: Identification
Topic: 2nd cy gull
Replies: 15
Views: 3981

Re: 2nd cy gull

I don't see much wrong with pure Caspian in the picture above? But maybe I've seen too many hybrids here in Poland ;)
by Ruud Altenburg
Sun Feb 27, 2011 4:45 pm
Forum: Identification
Topic: Ringed in Enghaveparken Copenhagen.
Replies: 11
Views: 2789

Re: Ringed in Enghaveparken Copenhagen.

How many Glaucous Gulls do you have over there? They seem to sneak into the background in every photo series you post! ;)
by Ruud Altenburg
Thu Feb 24, 2011 7:49 pm
Forum: Identification
Topic: Dark Herring Gull?
Replies: 2
Views: 847

Re: Dark Herring Gull?

I think we saw the same bird when we visited the dump? I'll check my pictures when I get home next week.
by Ruud Altenburg
Tue Feb 22, 2011 7:57 pm
Forum: Other taxa & hybrids
Topic: caspian? or hybrid!???
Replies: 2
Views: 1638

Re: caspian? or hybrid!???

Or Yellow-legged Gull?