Ross's Goose

Anser rossii

Very rare vagrant from North America to Britain, but sometimes escapes from captivity.

Breeds in North America, Greenland & Siberia.

Winters in coastal North America. 

Adults have a rounded head above a short neck.

The bill is short and triangular and has a bluish base with warty structures 

Adults are identified by all-white secondary feathers, while Juveniles' are dark centered.

The call is similar to the Snow Goose, but higher pitch.

In flight, the black wing tips show well.

They also have a smaller grinning patch at the base of the bill.