Lesser Black-backed Gull (graellsii & intermedius)

(last update: May 17 2015)

Lesser Black-backed Gull 3CY, September 12 2015, Utrecht, the Netherlands.

Complete moult: P5 fully grown, P6 equals P4 in length, P8-P10 old 2nd gen. S1 growing, other secondaries still old 2nd gen, brownish. All tail-feathers except R6 have been shed, growing 3rd gen. You now see the white upper and undertail coverts.