Lesser Black-backed Gull (graellsii & intermedius)

(last update: 09-06-2013)

Lesser Black-backed Gull 2cy, June 15 2013, Noordwijk, the Netherlands. Picture: Maarten van Kleinwee.

Bird without ring, hence no provenance on origin. Typical intermedius-like moult: extensive moult on winter grounds, including all wing-coverts and tertials. Such birds often have replaced (some) tail-feathers or even secondaries as well, like this bird. All secondaries replaced except S1 and S2, all tail feathers replaced. P1 and P2 are fully grown, P3 is missing and/or growing, P4 – P10 juvenile / first generation. Primary moult score 11 (5510000000).