Laughing Gull

The Laughing Gull (Leucophaeus atricilla) is a medium-sized gull of North and South America. It breeds on the Atlantic coast of North America, the Caribbean, and northern South America. Northernmost populations migrate further south in winter, and this species occurs as a rare vagrant to western Europe.

This species is easy to identify. It is 36–41 cm (14–16 in) long with a 98–110 cm (39–43 in) wingspan. The summer adult's body is white apart from the dark grey back and wings and black head. Its wings are much darker grey than all other gulls of similar size except the smaller Franklin's Gull, and they have black tips without the white crescent shown by Franklin's. The beak is long and red. The black hood is mostly lost in winter.
(Credit: http://en.wikipedia.org/wiki/Laughing_Gull)