Hello! I posted this gull before and received mainly suggestions for delawarensis, but also some for canus. Recently I looked it up again and saw some signs that could exclude canus and werent mentioned before or I didn`t know about. Some of the characteristics pointing towards RBG were stronger bill with curved upper mandible, pink base with black tip, also square head shape, the head and neck streaking with lunary-shaped apical part of breast feathers. The features that are strongly pointing RBG, that I didn`t notice before, are the strongly worn tail and wing juvenile feathers, which are much fresher in CG, also the replacement of some median and lesser coverts along with some tertials which is said in papers never to occure in CG at this time of the year. Also on the coverts, on the both sides, I think that still can be seen some atypical barred feathers for canus and more fitting for ring-billed.
Are these features enough to exclude canus from the competition?
Fron Bulgaria 14 Jan 2017
Are these features enough to exclude canus from the competition?
Fron Bulgaria 14 Jan 2017
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