Information about the breeding colony Gatovo (Belarus)

Dmitry Goncharov
Posts: 50
Joined: Fri Jan 11, 2013 10:16 pm

Information about the breeding colony Gatovo (Belarus)

Post by Dmitry Goncharov » Fri Jan 25, 2013 6:24 pm

Dear colleagues,
Last season I found on the roofs of industrial buildings near Minsk (Belarus), several breeding colonies (CG + HG + LBBG). The largest of these was located on the roof size 240х480 m in Gatovo village and included 1,830 nests cachinanns + argentatus + fuscus and part of the mixed pairs. I often have questions accurately identify taxa. Nests are located mainly at the base of rooflights, ventilators, often among the vegetation on the the broken stone-gravel. Most nests contained three eggs (the norm), and some even six (two females - adult + 4 cy). Hatching chicks began in May. Frequently observed bird deaths on various factors: man-made traps, overheating of the roof, falling flying chicks.
Individual photos are suggested for information.
I would really appreciate for the information on the colonial settlements of the complex «argentatus-cachinanns-fuscus», located on rooftops of your region.
Dmitry.
Attachments
ph.1..JPG
ph.1. General view (fragment) of the colony on the roof of the tannery (Gatovo, 28-04-2012)
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ph.2. Breeding pair cachinanns (28-04-2012)
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ph.3..JPG
ph.3. (04-05-2012, D.Goncharov
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ph.4.JPG
ph.4. (28-04-2012)
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ph.5..jpg
ph.5. Location of nests сachinanns (argentatus?) on shards of glass rooflight, between vent pipes, among vegetation, as well as Сombined egg-laying from two females on the roof of an industrial
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ph.6.JPG
ph.6.(04-05-2012, D.Goncharov)
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ph.8.(04-05-2012)
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ph.9. Territorial conflict
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ph.11.JPG
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ph.12.JPG
ph.12.JPG (657.17 KiB) Viewed 5491 times

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marsmuusse
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Re: Information about the breeding colony Gatovo (Belarus)

Post by marsmuusse » Sat Jan 26, 2013 3:19 pm

Hi Dmitry

Must be great to do some trapping, to measure these birds.

Mars

lou bertalan
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Re: Information about the breeding colony Gatovo (Belarus)

Post by lou bertalan » Sat Jan 26, 2013 3:56 pm

hi dmitry,

that seems to be in the hybrid zone argentatus x cachinnans. with ringing birds and taking pics of them you eventually you might get an overview of the percentages of pure cachinnans, pure argentatus and possible hybrids. but a large set of pics showing birds with open wings (both upper- and underside) the differences in wingpattern might give a clue. do you have flightshots? which you may post e.g. here: viewforum.php?f=11 - if you regularly post pics there, yome of the moderaters might create an own forum like the bucharest one. i would find that pretty informative since there hasn't been much on the internet from belorus about their breeding large gulls. which kind of LBBG do you have in the colony???

best,

lou

Dmitry Goncharov
Posts: 50
Joined: Fri Jan 11, 2013 10:16 pm

Re: Information about the breeding colony Gatovo (Belarus)

Post by Dmitry Goncharov » Mon Jan 28, 2013 12:38 pm

Hi Mars,
I have 10 photos of ringed birds from Belarus. In what section of the forum I can place information about the rings?
All the best,
Dmitry

Dmitry Goncharov
Posts: 50
Joined: Fri Jan 11, 2013 10:16 pm

Re: Information about the breeding colony Gatovo (Belarus)

Post by Dmitry Goncharov » Mon Jan 28, 2013 12:59 pm

Hi Lou,
To establish the exact ratio (CG + HG + LBBG + hybrids) in the area intergradations is problematic due to the number of birds (for this is necessary a lot of traps, and I often work alone). I can only tell about domination of L.cachinanns. On thе roof is registered nesting at least of two pairs LBBG. I'm not sure about the definition - graellsii - fuscus - intermedius - heuglini. The question of their diagnostics remains open.
On ph.1. - graellsii/intermedius, ph.2-4. - CG adult, ph.5-8. - CG 4cy, ph.9-12. - HG 4cy?
I would be very grateful for your opinion.
All the best,
Dmitry
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graellsii-intermedius-heuglini?
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CG 4cy?
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im.12. HG 4cy?
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Theo Muusse
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Re: Information about the breeding colony Gatovo (Belarus)

Post by Theo Muusse » Mon Jan 28, 2013 10:26 pm

Dmitry Goncharov wrote:Hi Mars,
I have 10 photos of ringed birds from Belarus. In what section of the forum I can place information about the rings?
All the best,
Dmitry
In the Belarus section!
I am interested!

Theo

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Theo Muusse
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Re: Information about the breeding colony Gatovo (Belarus)

Post by Theo Muusse » Mon Jan 28, 2013 10:36 pm

I see many straightforward herring gulls, a few uncertain from only one picture and just a few birds I would call 'pure' cachinnans.
The graellsii type is interesting, given the location, half way between graellsii and heuglini territory...

Theo

Dmitry Goncharov
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Joined: Fri Jan 11, 2013 10:16 pm

Re: Information about the breeding colony Gatovo (Belarus)

Post by Dmitry Goncharov » Wed May 08, 2013 2:48 pm

CG and perhaps hybrids in a mixed colony on the roof of the building (06-05-2013).
Attachments
cachinnans.jpg
Gatovo, 06-05-2013
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Dmitry Goncharov
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Re: Information about the breeding colony Gatovo (Belarus)

Post by Dmitry Goncharov » Wed May 08, 2013 3:15 pm

The second year in a row a nesting of LBBG is noted on the roof of a building in Gatovo in the same place in a mixed colony.
Subspecies status is not yet known (graellsii or intermedius?).
Attachments
LBBG.jpg
LBBG, Gatovo, 06-05-2013
LBBG.jpg (505.11 KiB) Viewed 5131 times

Ronald Klein
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Re: Information about the breeding colony Gatovo (Belarus)

Post by Ronald Klein » Fri May 10, 2013 10:30 am

Dmitri, a 2000er mixed colony explains some mysteries in Western Europe. There is evolution at our door and in front of our eyes, seems to be high pressure of cachinnans to Northwest. The same in Poland and East Germany. What I can say - ring, ring, ring them. I am sure, there are many surprises to expect.

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