Other Names: none
Distribution: inland North America and Europe in summer; South American and African coasts in winter.
Size: 24-26 cm in length with a 64-67 cm wingspan, weighing an average of 62 g.
Plumage: Both sexes have a solid black head and undersides, gray wings, and a moderately forked gray tail. Outside of the breeding season, the head and undersides are white, with dusky smudging around the eyes and the back of the neck. The legs, beak, and eyes are all black.