Mark Caunt wrote:I can't be certain without seeing bird or photographs but have you ruled out a corvid with leucistic plumage pigmentation?
It's fairly common in Forfar crows I have noticed.
No not ruled that out at all; just read more about this and could well be a leucistic Raven. Thoughts there are that leucistic birds I've seen and pictures of leucistic birds appear generally not to have neat tidy symmetry to the white feather positioning. This Raven, had 2 very symmetrical appearing strips, one the upper of each wing.
Thank you Mark & Barry for your help and thoughts on the Raven, much appreciated.
Thanks too to Dave, ref. your comment on the Eagle. It's all interesting.