Heuglin's Gull (L. heuglini / antelius)
(last update:
Possible heuglini adult, February 19 2012, Zagreb landfill, Croatia.
Most attention went to the adult with active moult in the inner secondaries and P9-P10. But we had 7 birds of the LBBG-complex. Here is another: the 'Lesser Black-backed Gull' caught with cannon netting, compared to michahellis.
Vermillion orbital ring. Extensive head streaking. Black on P4-P10. No mirror on P9. In Buzun's terminology, these P10 spots (he uses "2 mirrors") would be called 'closed' (not reaching the feather's edge).