Hi Greg,
check this one, a very advanced graellsii/intermedius, for example:
http://www.gull-research.org/lbbg3cya/3cyjanpic05.htm
More info on http://www.gull-research.org/lbbg3cya/l ... anapr.html.
Search found 229 matches
- Fri Apr 23, 2010 1:42 am
- Forum: Identification
- Topic: Heuglini in Poland
- Replies: 12
- Views: 7336
- Thu Apr 22, 2010 4:29 pm
- Forum: Identification
- Topic: Unknown gull
- Replies: 3
- Views: 2591
Re: Unknown gull
Thanks Jan; so far, you are the only one who has dared to tackle this problematic gull... The changing bill shape is a well-known issue, and is due to camera perspective. If you photograph a gull from behind, its bill will often look heavier than in perfect profile. This bird had a 'normal' bill sha...
- Tue Apr 20, 2010 7:50 pm
- Forum: Identification
- Topic: Unknown gull
- Replies: 3
- Views: 2591
Unknown gull
Does anyone have any idea what this is ? I am a bit puzzled. Photos taken at Sandgerdi, SW Iceland, on 2 April 2010. I did not notice this bird in the field, unfortunately, as I was focused on other gulls at that moment. It is only now that the bird has drawn my attention, being somewhere in the low...
- Thu Apr 15, 2010 12:50 pm
- Forum: Herring Gull
- Topic: Ageing Herring Gulls
- Replies: 3
- Views: 4112
Ageing Herring Gulls
For those who have not yet seen it, and who are interested in such things:
I have created a topic about variation in known-age Herring Gulls on the Surfbirds forum.
I have created a topic about variation in known-age Herring Gulls on the Surfbirds forum.
- Tue Apr 13, 2010 9:59 pm
- Forum: Herring Gull
- Topic: Herring gulls in Iceland
- Replies: 5
- Views: 4178
Re: Herring gulls in Iceland
On the outer webs, you mean ? "Wedge" may be a good word for such a (triangular) pattern, as it implies a broad base that gradually tapers to a thin end.
- Tue Apr 13, 2010 8:42 pm
- Forum: Herring Gull
- Topic: Herring gulls in Iceland
- Replies: 5
- Views: 4178
Re: Herring gulls in Iceland
Lou, in argenteus, only about 3% have a black bayonet pattern on either P7 or P8 (not P6). If we are counting birds with a 'bayonet' on both P7-8, the percentage is close to zero. Having said that, I should add that I do not really see distinct 'bayonets' on P6-7 of the bird you refer to . Instead, ...
- Tue Apr 06, 2010 9:54 pm
- Forum: White-winged Species
- Topic: Putative Kumliens Gull in Denmark?
- Replies: 3
- Views: 6799
Re: Putative Kumliens Gull in Denmark?
Coincidence or not, but I have just come back from a trip to Iceland, to study Iceland Gulls (among other). Second- and third-cycle birds (especially 'retarded' individuals) can certainly show (pale) brown-washed outer primaries! The Danish birds looks like a 3rd-cycle. I don't think you can exclude...
- Fri Mar 19, 2010 3:33 pm
- Forum: location IJmuiden
- Topic: IJmuiden 19 March 2010
- Replies: 2
- Views: 4965
Re: IJmuiden 19 March 2010
Hi Mars,
with such a small amount of black on P5-7 (at least), and such a prominent white tongue-tip on P7, I would be surprised if this was not an argentatus.
with such a small amount of black on P5-7 (at least), and such a prominent white tongue-tip on P7, I would be surprised if this was not an argentatus.
- Mon Feb 08, 2010 5:33 pm
- Forum: Identification
- Topic: Dark Herring Gul?
- Replies: 21
- Views: 12966
Re: Dark Herring Gul?
How much significans would you put in for the pale unmarked axillaries (armpit) in contrast to the rather dark underwing coverts as a contributing feature for smithsonianus Peter? Jan Hey Jan, the contrast, in itself, is not really something to go by; see, e.g., this colour-ringed bird from the Net...
- Sun Feb 07, 2010 8:16 pm
- Forum: Identification
- Topic: Dark Herring Gul?
- Replies: 21
- Views: 12966
Re: Dark Herring Gul?
I am quite convinced that argentatus can be eliminated, Jan. The dense, rather irregular brown pattern on the under tail-coverts, for instance, would be odd for that taxon. Jonas has aptly summarized the other important characters. Note also the all-dark outer edge of the tail, lack of streaking on ...