Search found 248 matches

by Ruud Altenburg
Tue Oct 06, 2009 8:54 pm
Forum: Other taxa & hybrids
Topic: Hybrids fuscus x argentatus
Replies: 25
Views: 10192

Re: Hybrids fuscus x argentatus

Bird 5, Heemskerk 05-10-09.
by Ruud Altenburg
Tue Oct 06, 2009 8:53 pm
Forum: Other taxa & hybrids
Topic: Hybrids fuscus x argentatus
Replies: 25
Views: 10192

Re: Hybrids fuscus x argentatus

Bird 4, Heemskerk 05-10-09.
by Ruud Altenburg
Tue Oct 06, 2009 8:52 pm
Forum: Other taxa & hybrids
Topic: Hybrids fuscus x argentatus
Replies: 25
Views: 10192

Re: Hybrids fuscus x argentatus

Bird 3. Uitgeestermeer 27-09-09.
by Ruud Altenburg
Tue Oct 06, 2009 8:48 pm
Forum: Other taxa & hybrids
Topic: Hybrids fuscus x argentatus
Replies: 25
Views: 10192

Re: Hybrids fuscus x argentatus

Bird 2, Heemskerk 21-09-09.
by Ruud Altenburg
Tue Oct 06, 2009 8:47 pm
Forum: Other taxa & hybrids
Topic: Hybrids fuscus x argentatus
Replies: 25
Views: 10192

Re: Hybrids fuscus x argentatus

Maybe easier to upload some pictures here. Bird 1, Heemskerk 21-09-09.
by Ruud Altenburg
Tue Oct 06, 2009 12:36 pm
Forum: Other taxa & hybrids
Topic: Het H word - hybrids from Poland
Replies: 21
Views: 9282

Re: Het H word - hybrids from Poland

Another suspicious bird, probably Herring x Caspian. Inner primaries showed typical Caspian pattern. Heemskerk 06-10-09.
by Ruud Altenburg
Fri Oct 02, 2009 8:23 pm
Forum: Lesser Black-backed Gull
Topic: unringed fuscus
Replies: 15
Views: 7866

Re: unringed fuscus

It seems the wrong birds in this picture are ringed!
by Ruud Altenburg
Sun Sep 27, 2009 8:30 pm
Forum: Other taxa & hybrids
Topic: Hybrids fuscus x argentatus
Replies: 25
Views: 10192

Hybrids fuscus x argentatus

This week I observed no less than three (probable) adult hybrids Herring x LBBG: http://vwgmidden-kennemerland.waarneming.nl/waarneming/view/44697835 http://vwgmidden-kennemerland.waarneming.nl/waarneming/view/44757852 I wonder how and where two commonly occurring species in NW Europe can hybridize?...