Western Bird Guide: Birds of the Rockies and West to the Pacific

by Charles K. Reed

CLIFF SWALLOW.

612. Petrochelidon lunifrons. 5½ inches.

Their range is throughout the whole of North America; they can easily be recognized by their brownish throat and breast, white forehead and black cap. Their nests or homes are built of mud, securely cemented to the face of cliffs, or under the eaves of buildings. They make them round or gourd-shaped, with a small opening in the side, and lining the inside with grass and feathers. They lay four eggs, creamy white, spotted with shades of brown (.80 × .55).