L. delawarensis ad-summer/winter

France; Arcachon (33) 10/3/10 (digiscoped). Upperparts paler grey compared to ad-winter L. canus behind

L. delawarensis ad-summer/winter
L. delawarensis ad-summer/winter

France; Arcachon (33) 10/3/10 (digiscoped). Upperparts paler grey compared to ad-winter L. canus behind