Covert moult in argentatus

marsmuusse · Post by **marsmuusse** » Mon Feb 01, 2010 7:33 pm

Not the best weather, but anyway. Another 2cy with replaced feathers on both sides. This one, and previous bird were photographed on January 29 2010, IJmuiden, Holland.
Right side: limited replaced feathers (gc 5-6) but left side also tertials. See picture from behind, and note the different pattern on the tertials left and right.

marsmuusse · Post by **marsmuusse** » Mon Sep 27, 2010 6:36 pm

Just came accross this one:
http://www.gull-research.org/hg/hg1cy/1cysept04.html

Covert moult in argentatus

Re: Covert moult in argentatus