Herring Gull (argentatus & argenteus)

(last update: February 11, 2013)

Herring Gull (argenteus) 3CY, July 30 2014, IJmuiden, the Netherlands.

In complete moult. P1-P6 fully grown, P5 with full subterminal band, P7 missing, P8-P10 old 2nd gen. PMS=31. Central rectrices still present (tail feather moult centrifugal, replacement central feathers first, then outwards). Outermost secondary S1 growing, S2 and inner feathers old 2nd gen. Missing central GC expose 2nd gen secondary centres underneath.