Heuglin's Gull (L. heuglini / antelius)
(last update:
Heuglini adult, November 30 2009, northern Oman. Picture: Hans Larsson (his website).
Active moult in all flight feather tracts. P4/P7. PMS=24. Outermost secondary just dropped. Active moult in rectrices. This bird shows a "contracted" moult; normally S1 is dropped slightly later (P5/P6 growing halfway) and this is also normally the time to start shedding tail feathers. Here, in this individual, all tail feathers have been dropped already.
