DaveB
birding.daveb.co.uk
whitburnmark said:The general feeling is that it's an aberrant Goldeneye, and not a hybrid. There's nothing in the structure or bill shape to indicate another species is involved - certainly if something like Smew was involved (as has been recorded before in Europe), then the bill would be quite different. The only difference to a normal Goldeneye is the leucistic look to some parts of it's plumage - must be leucism rather than bleaching as it showed a similar pattern last winter.
I've not sure of the full range of species Goldeneye has been proved to hybridise with, but my moneys firmly on an aberrant Goldeneye.
A debate of this bird took place last year and we came up with the same conclusion. A record shot of this bird is on my web site:
http://www.durhambirdtours.co.uk/4.images_birds/Goldeneye.html
DaveB


