Argentatus with clipring - tayeri pattern

Post Reply
Albert de Jong
Posts: 48
Joined: Wed Nov 11, 2009 8:53 am
Location: The Netherlands
Contact:

Argentatus with clipring - tayeri pattern

Post by Albert de Jong » Fri Mar 29, 2013 4:00 pm

Today me and Frank Majoor observed a pair of most likely argentatus Herrings on the dump of Barneveld. The male was wearing a clipring at the left tarsus. We were not able to read it due to the distance.
While approaching the birds, they flew off.

Interestingly, the male was showing a tayeri-patter in p9-10. Does anybody have any idea about its origin. Any project with cliprings in the Baltic?
Attachments
Argentatus_ad_2013-3-29_Barneveld_2.jpg
Argentatus_ad_2013-3-29_Barneveld_2.jpg (255.46 KiB) Viewed 4332 times
Argentatus_ad_2013-3-29_Barneveld_1.jpg
Argentatus_ad_2013-3-29_Barneveld_1.jpg (217.72 KiB) Viewed 4332 times
Last edited by Albert de Jong on Fri Mar 29, 2013 8:39 pm, edited 1 time in total.

adriaens
Posts: 226
Joined: Sun Sep 27, 2009 9:24 pm

Re: Argentatus with clipring - tayeri pattern

Post by adriaens » Fri Mar 29, 2013 4:54 pm

Hi Albert,
I cannot help with the clip ring, but maybe with the species:
I feel sure that the bird is a Caspian Gull, rather than argentatus. A few show such a "thayeri pattern".
Note that the underside of P10 shows almost no black on the inside of the shaft, which is typical for Caspian Gull.
Also, Herring Gulls with this little black in the primaries do not normally show a black band on P5.

User avatar
Theo Muusse
Posts: 409
Joined: Fri Oct 02, 2009 6:24 pm
Location: Dordrecht

Re: Argentatus with clipring - tayeri pattern

Post by Theo Muusse » Fri Mar 29, 2013 5:15 pm

Agree with Peter.
The clipring appears darkish which reminds me of the polish type...
Matsalu would, I feel, appear higher and less dark.
Frank didn't have a clue?

Theo

Albert de Jong
Posts: 48
Joined: Wed Nov 11, 2009 8:53 am
Location: The Netherlands
Contact:

Re: Argentatus with clipring - tayeri pattern

Post by Albert de Jong » Fri Mar 29, 2013 8:38 pm

Thanks Peter and Theo.
Our first impression was cachinnans either. But I only had my binoculars and camera, since my scoop is in repair. I dind't know the p5 thing and was confused by the pattern.
I guess it must have been Poland again.
Nevertheless, it was the first time I saw a pair of cachinnans in the Netherlands...

User avatar
JanJ
Posts: 436
Joined: Mon Oct 12, 2009 10:08 pm

Re: Argentatus with clipring - tayeri pattern

Post by JanJ » Fri Mar 29, 2013 9:20 pm

One more vote for Caspian.

JanJ

User avatar
marsmuusse
Posts: 666
Joined: Sun Sep 27, 2009 12:43 pm

Re: Argentatus with clipring - tayeri pattern

Post by marsmuusse » Sat Mar 30, 2013 3:38 pm

Today, at my village Voorhout, adult Herring with thayeri on P9-P10.
Attachments
hgthayeri_4357.jpg
hgthayeri_4357.jpg (492.26 KiB) Viewed 4308 times

Post Reply