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Hi Mark, being a bit of a novice is the Dark-bellied Brent Goose a recognised sub-species or a local variation. Your advice would be gratefully received. Regards Chris.
Chris Brooks - www.dragonfly-images.co.uk
My Flickr site - www.flickr.com/photos/ceb1298
Dark-bellied (B. b. bernicula - from Russia/W Siberia), Pale-bellied (B. b. hrota - from Svalbard, Greenland) and Black Brant (B. b. nigricans - E Siberia, Alaska, NW Canada) are the three subspecies of Brent Goose. All occur in Britain and Ireland, though Black Brant is a rare vagrant, usually mixed in with large flocks of Dark-bellied Brents. Nick Moran.
The three forms mentioned by Birdtrack are widely accepted as subspecies of Brent Goose - and have been proposed as species in their own right (eg. they are treated as separate species by the Dutch authorities).
There is also a fourth form, Grey-bellied Brant, with a restricted breeding range (Melville and Prince Patrick Islands), but this form has yet to be widely recognised - and (as far as I know) has not yet been 'officially' named. This form has been recorded in Ireland.
Thanks, really useful information.
Lat/Lng: 50.7, -1.6
OS grid ref: SZ3091