Range. - Asia; casual in Alaska in summer; nesting habits and eggs like the next.
Range. - Europe and Greenland; casual on the Atlantic coast of North America.
This very abundant Old World species is a common breeding bird in Greenland and probably also in Labrador. They nest in crevices of quarries, holes in the ground, or stone walls, making a rude nest of weeds, moss or grasses, lined with hair or feathers, and during May lay from four to six pale greenish blue eggs; size .90 x .60.
Pale greenish blue.