- The breast is concolorous with the flanks and decidedly browner than the black neck--just as in Cackling and Canada geese, but differing markedly from Brant's (and Barnacle Goose's) extensive, black neck stocking.
- The characteristic white neck markings of Brant are absent.
- There is a hint of whitish cheeks, on both sides of the face, as in Cackling and Canada geese.
- The tail is extensively black beyond the coverts, as in the white-cheeked geese, but unlike Brant.
|Here you could see the extensive black beyond the coverts (see # 4 above for more details).|
you should read this equally top notch analysis from Angus Wilson, when he first documented this bird in 2003. Angus, presents the theory of a Brant x Canada with solid reasons. You should also take a look at the comments area where birders from around the world offered their opinion.
Randall's Island, Brant x Cackling Goose, Brant, New York City