Viking Gull - Larus hypergentatus

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marsmuusse
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Viking Gull - Larus hypergentatus

Post by marsmuusse » Sun Sep 27, 2009 7:23 pm

There will always be a question whether to name it argentatus or hypergentatus.

Bird in Holland:
Image
on: http://www.gull-research.org/hypergenta ... tus01.html

Bird in Gotenborg:
Image
on: http://www.gull-research.org/hg/hg1cy/1cyaugust09.htm


References.
Harry Lehto - Finland:

http://users.utu.fi/hlehto/photo/gull/largxhyp.shtml

Mars
Last edited by marsmuusse on Mon Sep 28, 2009 7:29 pm, edited 2 times in total.

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marsmuusse
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Re: Viking Gull - Larus hypergentatus

Post by marsmuusse » Sun Sep 27, 2009 8:00 pm

Norway, hyperboreus x argentatus can be found as south as S Norway (!);

http://cyberbirding.uib.no/gull/ind_ufo.php

Mars

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marsmuusse
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Re: Viking Gull - Larus hypergentatus

Post by marsmuusse » Wed Oct 14, 2009 3:48 pm

I've just added a few images of the Viking Gull from IJmuiden, when it returned in its 2nd winter. Pictures are from Febr 2008, so bird in 3cy:

http://www.gull-research.org/hypergenta ... tus01.html

I also came across a few pictures which I feel could be used in this category. Its a 2cy (Febr 2008 as well) bird which I put in the books as the 'palest end of the spectrum' in argentatus. But of course its plumage may also be explained by 'at least some' influences from hyperboreus. Bird was photographed in IJmuide (Netherlands) as well...

Image

Image

Image

Image

adriaens
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Re: Viking Gull - Larus hypergentatus

Post by adriaens » Wed Oct 14, 2009 4:05 pm

See also this one, taken in foggy conditions:
http://picasaweb.google.be/Zorkyyy/Viking

Ruud Altenburg
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Re: Viking Gull - Larus hypergentatus

Post by Ruud Altenburg » Sun Oct 25, 2009 4:53 pm

The bot-belly, short legs and 'facial expression' remind me of Glaucous. Also the primaries were paler brown. Or is it just the bill? Amsterdam, 25-10-09.
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Ruud Altenburg
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Re: Viking Gull - Larus hypergentatus

Post by Ruud Altenburg » Sun Nov 01, 2009 2:33 pm

One more Herring from the paler end, Heemskerk 31-10-09. Don't see any Glaucous influence here.
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Derek Charles
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Re: Viking Gull - Larus hypergentatus

Post by Derek Charles » Tue Nov 03, 2009 1:33 pm

Hi agree that Ruuds gull does look to have a past history with a Glaucous!

Here are a mixture of "presumed" hybrids all from Ireland.

derek
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Spinus
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Re: Viking Gull - Larus hypergentatus

Post by Spinus » Wed Jan 27, 2010 11:52 pm

Hi, two birds from Poland, both of theme have been seen in summer season.
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Theo Muusse
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Re: Viking Gull - Larus hypergentatus

Post by Theo Muusse » Thu Jan 28, 2010 9:05 pm

Nelson B1 and B2 may very well have a GBBG as a parent.

Theo

Spinus
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Re: Viking Gull - Larus hypergentatus

Post by Spinus » Sun Jan 31, 2010 7:36 pm

Thanks Theo for answer. This bird indeed doesn't looks like other "typical" hyperargentatus, but I have seen only few pictures of hybrid with GBBG.
Can you explain your presumption, is there any diagnostic details (bil, plumage pattern)?
Do you know any sites with pictures of hybrids?
One more pictures of this ineresting gull.
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