|Nice remnant necklace. Note the Caspian Gull-like white tip to P10, also shared by argentatus Herring. The pale tongue on the underside of this feather looks atypically dark, while P9 is within range for Caspian Gull showing a banded white tip.|
Wednesday, 6 February 2013
one and a half Casps
I was on the tip on Saturday, rudely interrupted by news of that big brute of a finch. It didn't however dent my enjoyment of the gulls and after seeing a 2nd-winter Caspian Gull (the same bird that has been regular at Wat Tyler CP recently), the other Caspian-esque Gull was this individual, which I firmly believe comes from that hybrid swarm in/near Poland where cachinnans mixes with argentatus Herring Gulls. So for now I'm going to call this near adult (presumably 5cy) bird a hybrid.
Interestingly, to throw even more into the mix, a Polish-ringed bird that was seen as a first-winter several winters ago - where it looked like a decent 1st-winter Caspian Gull - was seen again on the tip as a near adult, where it looked decidedly like a Herring Gull. Interesting stuff, and it leaves one to wonder what all these 1st-winter Casps we see in Britain will actually mature into. The couple of adult Med Gulls whacking about were slightly easier to identify!