Larus canus

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marsmuusse
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Larus canus

Post by marsmuusse » Sun Sep 27, 2009 6:55 pm

Last edited by marsmuusse on Mon Sep 28, 2009 7:39 pm, edited 1 time in total.

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marsmuusse
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Re: Larus canus

Post by marsmuusse » Sun Sep 27, 2009 7:01 pm

Image

6 heinei just west of the Ural, in N Russia. Photographed by Antero.

http://www.elisanet.fi/antero.lindholm/ ... /komi.html

Mars

Cristian Mihai
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Re: Larus canus

Post by Cristian Mihai » Wed Nov 11, 2009 4:52 pm

I like this species. It's pretty common here in Bucharest during the winter. Here are some pics taken mainly during the winter 2008-2009.
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A young michahellis assaulting a young canus.
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marsmuusse
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Re: Larus canus

Post by marsmuusse » Wed Nov 11, 2009 7:07 pm

Hi Cristian,
Not that I would like to force you into any field research... But this is another nice taxon to do some working on.
!!!
Have you ever considered catching these L. canus in winter to measure the wing span for heinei?
If you want to know how to do this, Frank Majoor (the Netherlands) has good experiences using cages in winter to process many birds in one catch for measurements and ringing.
Would be nice to have more data on the web about this taxon. ;-)

Mars

Cristian Mihai
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Re: Larus canus

Post by Cristian Mihai » Wed Nov 11, 2009 7:48 pm

I would like to try this type of study, but you’ll have to tell more about the catching method. Usually they gather on relative thin ice (frozen lakes)…

P.S. The main problem with the Yellow-legged study is that I don’t know a large colony here in Bucharest. I usually study these gulls in the feeding/”bath” areas – I spotted two such areas in/near Bucharest where you can see tens or hundreds of birds in a few hours. The breeding population is large, but it isn’t a large colony (or I didn’t discover it). There is a large number of very small colonies on the building roofs, all over the city.
Another problem is that unfortunately there are a very few ringed gulls here. So, it’s really hard to identify a large number of birds and to re-find them in feeding/”bath” areas.

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marsmuusse
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Re: Larus canus

Post by marsmuusse » Wed Nov 11, 2009 8:21 pm

About micha's: you don't need a group of more than 100. Best would be a group of birds of which you know the origin. And best would be to follow such a group throughout a ceratin period. By doing so, you will get data of specific populations. So, in Bucharest you don't have to bother about argentatus (let the Finnish do this) and you don't have to bother about S French micha's or birds from the Azores (other people will do that). Better to get a good idea about your own local population, as sooner or later, it will be very relevant information when combined with other researches abroad. In my opinion, it would be an enormeous step forewards if we can do such research in the whole of Europe and combine the findings. Therefore it is extremely important of course to 'fine-tune' the method and research classes of this.

About canus / heinei: Frank Majoor goes out and feeds them in winter, to make them feel comfortable. Later, a large wooden cage is set up with on top the strongest of fish lines, crossed all over. Birds can land into the cage to feed, but don't manage to get out again with spread wings. Once you have enough birds in the cage, you start processing (keep them in a dark place while waiting!). Birds are ringed and measured/photgraphed and released again. Pretty easy actually.

Cristian Mihai
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Re: Larus canus

Post by Cristian Mihai » Thu Nov 12, 2009 11:38 am

Where I could see some pics with such cages?

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JanJ
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Re: Larus canus

Post by JanJ » Tue Dec 08, 2009 7:25 pm


Cristian Mihai
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Immature birds, Bucharest, December 31st

Post by Cristian Mihai » Sat Jan 02, 2010 8:05 am

Some pics (sorry for the quality!) taken on the last day of 2009. Tineretului Park, Bucharest.
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Same bird as in 3266m
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Same bird as in 3234m
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Same bird as in 3215m
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Theo Muusse
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Location: Dordrecht

Re: Larus canus

Post by Theo Muusse » Sat Jan 16, 2010 8:37 pm

Today a full juvenile canus, January 16th 2010 in Dordrecht, Holland.

Theo
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