Search found 248 matches

by Ruud Altenburg
Wed Feb 22, 2012 9:23 am
Forum: IGM Zagreb 2012
Topic: Unringed birds
Replies: 23
Views: 10681

Re: Unringed birds

Three Greater Black-backs observed, one 2cy at the river Sava on Friday and two adults on the parking on Saturday.
by Ruud Altenburg
Wed Feb 22, 2012 8:54 am
Forum: IGM Zagreb 2012
Topic: Unringed birds
Replies: 23
Views: 10681

Re: Unringed birds

Probably bird no 2, photographed on Friday on the parking. Overview shot by Chris Gibbins.
by Ruud Altenburg
Tue Feb 21, 2012 4:20 pm
Forum: IGM Zagreb 2012
Topic: Unringed birds
Replies: 23
Views: 10681

Re: Unringed birds

Bird no 4: the 'lesser black-backed gull' caught with cannon netting, compared to michahellis.
by Ruud Altenburg
Tue Feb 21, 2012 12:12 pm
Forum: IGM Zagreb 2012
Topic: Ringed birds
Replies: 8
Views: 17254

Re: Ringed birds

Two birds with Polish rings that seem to show michahellis features.
by Ruud Altenburg
Tue Jan 24, 2012 5:57 pm
Forum: White-winged Species
Topic: Identification of second winter kumlieni
Replies: 2
Views: 4058

Identification of second winter kumlieni

Currently unprecedented numbers of Iceland Gulls reach the Dutch shores. Today's maximum count was five at a single locality! Among these birds are a couple of very dark specimens, which are discussed in this topic . I have asked Chris Gibbins' opinion on second winter kumlieni . Chris took the time...
by Ruud Altenburg
Mon Jan 16, 2012 9:53 am
Forum: Identification
Topic: teus or tatus Herring???
Replies: 6
Views: 1144

Re: teus or tatus Herring???

There a better characters regarding smithsonianus than the one you mention ;) This is a European Herring.
by Ruud Altenburg
Mon Jan 16, 2012 9:50 am
Forum: Identification
Topic: Caspian gull?
Replies: 3
Views: 738

Re: Caspian gull?

Looks like a YLG to me.
by Ruud Altenburg
Sat Jan 07, 2012 11:13 am
Forum: Identification
Topic: Hybrid Herring x GBBG
Replies: 2
Views: 826

Hybrid Herring x GBBG

Does anybody have experience with this hybrid? I came across this observation in the Netherlands. Especially the bill and (somewhat less obvious) the head shape remind me of GBBG.
by Ruud Altenburg
Mon Jan 02, 2012 4:24 pm
Forum: Identification
Topic: American or European HG
Replies: 3
Views: 974

Re: American or European HG

Frankly it looks like an LBBG to me!
by Ruud Altenburg
Sat Dec 17, 2011 11:12 pm
Forum: Identification
Topic: strange CG?
Replies: 1
Views: 806

Re: strange CG?

A Yellow-legged Gull.