Lesser Black-backed Gull 3CY, May 29 2017, Heemskerk, the Netherlands.
Bird returned from wintering grounds with arrested moult in primaries. Right wing current situation: P1-P3 3rd gen replaced last winter, P4-P10 old 2nd gen. Left wing: P1 3rd gen replaced last winter, P2 old 2nd gen, P3 3rd gen replaced last winter, P4-P10 old 2nd gen. All secondaries replaced as well last winter, now 3rd gen.
Advanced tail, almost completely white.
Complete moult not started.
![](imagesmay2/3cy12_38A4685.jpg)
![](imagesmay2/3cy12_38A4704.jpg)
![](imagesmay2/3cy12_38A4705.jpg)
![](imagesmay2/3cy12_38A4714.jpg)
![](imagesmay2/3cy12_38A4719.jpg)
![](imagesmay2/3cy12_38A4722.jpg)
![](imagesmay2/3cy12_38A4730.jpg)
![](imagesmay2/3cy12_38A4734.jpg)
![](imagesmay2/3cy12_38A4747.jpg)
![](imagesmay2/3cy12_38A4750.jpg)
![](imagesmay2/3cy12_38A4759.jpg)
|