Friday, October 31, 2008
Thursday, October 30, 2008
3CY Caspian Gull hybrid?, Cottenham Long Drove, 30th October 2008, © Dick Newell
In many respects, this bird looks pretty good for a Caspian Gull. It has long wings, long legs, a good head-shape, slender bill, a beady eye well forward, and the typical shawl around the base of the neck of a Caspian Gull. However it has fairly bright yellow legs, a bright bill and a bill-shape that is not quite straight enough for a Caspian Gull, it droops a little in a manner similar to Yellow-legged Gull. So my guess would be that this is a hybrid Yellow-legged x Caspian Gull (RGN).
Posted by CBC at 9:26 PM
Wednesday, October 29, 2008
Tuesday, October 28, 2008
Monday, October 27, 2008
Tuesday, October 21, 2008
Sunday, October 19, 2008
Yellow-legged/Caspian Gull?, Paxton Pits, 19th October 2008, © Jamie Wells
At first sight, the bullet-hole eye, rounded head and parallel-sided bill, make this gull look like a Caspian Gull. However, it looks a little dark and the mirror on P10 is the typical trapezoidal shape of adult Yellow-legged Gull. However, the bird is not fully adult, there is a brown smear on the tertials, so the mirror might not mean much. The bird does not exhibit the ridiculous long-winged appearance of some Caspian Gulls. Apparently there were some grey tongues protruding into the black on the primaries.
Without a view of the legs, this bird may be best left unidentified, it could even be a hybrid (RGN).
Posted by CBC at 7:17 AM
Saturday, October 18, 2008
Friday, October 17, 2008
Yellow-legged Gull, Landbeach, 11th October 2008, © Dick Newell
This gull has a very large mirror on P10 merged into the white tip on that feather. It also has a mirror on P9. The black band on P5 is a bit greyed out on the inner web and is not continuous across the feather, it is split in the middle. The pattern of P9 and P10 as well as the lack of a mark on P4 seems to fit what Olsen & Larsson say about eastern populations of Yellow-legged Gull. Or is it just an unusual western Mediterranean bird?
Posted by CBC at 6:50 AM
Thursday, October 09, 2008
Sunday, October 05, 2008
Saturday, October 04, 2008
Yellow-legged Gull, Cottenham Long Drove, 4th October 2008, © Dick Newell
This bird is about as streaky-headed as nominate michahellis gets, it is also quite dark, although not quite as dark as it seems in this photograph. It is not fully adult, as evidenced by the black alula, so the lack of a mirror on P10 is not informative. However, one is tempted to speculate that it might be atlantis.
Posted by CBC at 9:47 PM