jueves, 8 de septiembre de 2011

Larus fuscus fuscus.

Baltic Gull, Larus fuscus fuscus. 2cy?

This Baltic shows an amazing state of moult in primaries:

Highly worn feathers -- P1-P4 and P9.
Moderate worn feathers -- P5-P8 and P10.

Note that P10 seems to be 2nd generation, unlike P1-P4 (3rd generation?). This pattern indicates two irregular moult waves (most probably in winter and spring).

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