Lesser Black-backed Gull (graellsii & intermedius)

(last update: May 17 2015)

LBBG 3cy, May 01 2006, Texel, the Netherlands. 

Grey tone typical for local birds, breeding graellsii in the Netherlands, but grey tone may also fit intermedius. Moult strategy more in line with nominate fuscus, as the primary moult is arrested at P5 (left) and P6 (right) and several inner secondaries have been replaced as well. As can be expected in such advanced birds, the complete tail is new.