Staffelmauser in ylg complex

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marsmuusse
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Staffelmauser in ylg complex

Post by marsmuusse » Thu Sep 02, 2010 7:36 am

I received an image from Israel (of course by THE gull-photographer Amir Ben Dov) showing this bird:

http://www.gull-research.org/armenicus/ ... aug04.html

As it seems, there are two moult waves in the primaries: the outer primnaries are still growing (which is normal for this time of the year) and a second moult wave seemed to have started at the inner primaries again?

Anyone seen such in the michahellis - cachinnans complex? If I remember correct, there should be a picture on the web showing this in an expected barabensis from the Guld I though, but I couldn't relocate it. But then, barabensis is sometimes classified under "taymirensis", in which I would expect it to occur more often...

adriaens
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Re: Staffelmauser in ylg complex

Post by adriaens » Thu Sep 02, 2010 12:03 pm

Never seen anything like this in mich/cach myself....
Interesting - but my guess is that this kind of moult is rare in Armenian Gull ?
Fantastic photographs by Amir, by the way!

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Theo Muusse
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Re: Staffelmauser in ylg complex

Post by Theo Muusse » Thu Sep 02, 2010 7:34 pm

Note the brown wash on the fresh p1. Not that common in 3rd gen p1 on mich...
The moult in the tail is pretty late, considering P and S are almost fully grown.

Theo

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Re: Staffelmauser in ylg complex

Post by Theo Muusse » Thu Sep 02, 2010 7:38 pm

And, is that very black 2 gen R6 a pointer to ID armenicus from michahellis?

Theo

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Re: Staffelmauser in ylg complex

Post by Theo Muusse » Thu Sep 02, 2010 7:39 pm

Theo Muusse wrote:Note the brown wash on the fresh p1. Not that common in 3rd gen p1 on mich...
The moult in the tail is pretty late, considering P and S are almost fully grown.
But then again of course, they are on their 2nd moult too.

Theo

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marsmuusse
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Re: Staffelmauser in ylg complex

Post by marsmuusse » Mon Nov 29, 2010 8:34 pm

Again, Amir has sent a picture that shows a bird (believed to be an adult this time), which has two moult locations in the primaries. The picture is not in focus (sorry) and therefore not good enough for the site, but the bird is interesting and maybe illustrative for "staffelmauser" and this individual too may represent a small percentage of armenian gulls that show this phenomenon. I copied the image as attachment in this post.

Another individual can be seen here:
http://www.gull-research.org/armenicus/ ... oct43.html
It is of less interest because the moult strategy of the inner primaries in the left wing does not seem to be mirrored in the right wing (lacking new replacements).
Attachments
Armenian Gull AE4F7729 Maagan Michael 15.10.10.jpg
Armenian Gull AE4F7729 Maagan Michael 15.10.10.jpg (267.65 KiB) Viewed 2891 times

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marsmuusse
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Re: Staffelmauser in ylg complex

Post by marsmuusse » Mon Dec 06, 2010 7:04 pm


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little-W
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Re: Staffelmauser in ylg complex

Post by little-W » Tue Dec 07, 2010 4:18 pm

To me that looks like a half-grown P1, as opposed to a displaced feather. Especially in pic #2...
Regards,

Maarten van Kleinwee
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Blog: Gulls to the horizon
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