Herring Gull (argentatus & argenteus)
(last update: February 11, 2013)
Herring Gull 2cy, July 18 2013, Noordwijk, the Netherlands.
Active moult / complete moult in summer months: P5/P8. P6 about 2/3 its final length.
Active moult in secondaries and tail as well. S1 missing. Central and inner secondaries still juvenile. Central tail-feathers R1-R2 missing.
Many coverts renewed. Missing central greater coverts expose base on secondaries lying underneath. Note greater covert row have two moult waves, one starting at outer feathers and another from inside.
