Tuesday, 8 December 2009

Greenfinch with aberrant moult

Some pics from Mick of another young female bird with some replaced primaries (but not the corresponding primary coverts) and a really obvious moult limit in the alula. Not sure quite what's happening in the tail... We expect young birds not to moult any wing feathers, but the more we look, the more we find doing so, though it is rarely complete and rarely obvious!

No comments:

Post a Comment