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Wednesday 21st January 2009, 14:03
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#1 |
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Registered User
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Larus canus or L. cachinnans? Kiev, Ukraine
Is this Larus canus or L. cachinnans? Picture taken a few days ago, Kiev, Ukraine
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Flickr | birdwatch.org.ua (in Russian) Latest lifer: #317. Eurasian River Warbler, May 11, 2013 |
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Wednesday 21st January 2009, 14:15
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#2 |
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Cristian Mihai
Join Date: Apr 2007
Location: Bucharest
Posts: 13,675
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Hi,
This is a Common Gull: http://farm4.static.flickr.com/3089/...dc940f.jpg?v=0 So, what do you think, it looks like yours?
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Cristian http://www.shutterstock.com/g/cristian64 http://www.dreamstime.com/Cristian64_info |
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Wednesday 21st January 2009, 14:21
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#3 |
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Registered User
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Well, it looks like... I'm not sure about the bill. Whether it is more or less massive.
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Flickr | birdwatch.org.ua (in Russian) Latest lifer: #317. Eurasian River Warbler, May 11, 2013 |
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Wednesday 21st January 2009, 15:00
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#4 |
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Registered User
Join Date: Mar 2005
Location: Sweden
Posts: 7,791
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Hello all.
canus or cachinnans? A very good question, although some might think this an odd comparison - but canus signals cachinnans due to dark eye and rather similar pattern on outer primaries (p10 & p9). However, in this flying gull all the cachinnans features are visible. So the gull is not a Common Gull. A quick look at the primary pattern on the underwing in Cristans Common Gull and this one: http://www.tarsiger.com/images/masa/Larcan55.jpg shows that on p10, 9 and to a lesser extent also p8 there´smore black compared to cachinnans. Mirror on p10 & 9 are rather similar, with a dark subterminal band on p10 in canus, which is sometimes lacking, as it can be present in cachinnans. The structure and bill size is much better for cachinnans, probably a female (smaller -billed compared to a male. JanJ Last edited by JANJ : Wednesday 21st January 2009 at 15:03. |
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Wednesday 21st January 2009, 15:01
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#5 |
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Registered User
Join Date: Jan 2009
Location: London
Posts: 458
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I think it's a ylg, based on the bill mark.
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Wednesday 21st January 2009, 15:20
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#6 |
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Registered User
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shrikebirder, I thought common gull may have the bill mark in winter.
JANJ, great thanks for the profound answer!
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Flickr | birdwatch.org.ua (in Russian) Latest lifer: #317. Eurasian River Warbler, May 11, 2013 |
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Wednesday 21st January 2009, 15:52
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#7 | |
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Cristian Mihai
Join Date: Apr 2007
Location: Bucharest
Posts: 13,675
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Quote:
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Cristian http://www.shutterstock.com/g/cristian64 http://www.dreamstime.com/Cristian64_info |
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Wednesday 21st January 2009, 17:27
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#8 |
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the birdonist
Join Date: Oct 2004
Location: Stuttgart
Posts: 8,790
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hello khustochka,
definitely a caspian gull (larus cachinnans). among the argentatus relatives adult caspian gull is most likely to show a dark subterminal mark on bill. surely common gull (canus) does have such a mark as well. this bird has the structure of a large white headed gull with a proportionally smaller head and heavier body. bill is seen from below thus giving the slim appearance. primary pattern, as said above, is spot on for cachinnans, not so for canus or michahellis. regards
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lou |
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Wednesday 21st January 2009, 18:23
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#9 |
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Registered User
Join Date: Oct 2005
Location: Sheffield
Posts: 2,024
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Yes a definite cachinnans.
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Wednesday 21st January 2009, 21:20
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#10 |
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Registered User
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Great thanks, Lou, Josh Jones!
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Flickr | birdwatch.org.ua (in Russian) Latest lifer: #317. Eurasian River Warbler, May 11, 2013 |
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