The Wedge-Tailed Gull — Rhodostethia Rosea, Macgillivray
This extremely scarce Arctic Gull is said to have been obtained in Yorkshire on one occasion. It may be recognised by the wedge-shaped tail.
The adult is grey on the mantle; the rest of the plumage, except for a narrow black ring round the neck, is pure white. Length 13·5 in.; wing 10·25 in.