Range. - Whole of North America, breeding north from the south Atlantic and Gulf States.
These birds can easily be recognized by their brownish throat and breast, whitish forehead and buffy rump. They build one of the most peculiar of nests, the highest type being a flask shaped structure of mud securely cemented to the face of a cliff or under the eaves of a building, the entrance being drawn out and small, while the outside of the nest proper is large and rounded; they vary from this typical nest down to plain mud platforms, but are all warmly lined with grass and feathers. In some localities, cliffs resemble bee hives, they having thousands of these nests side by side and in tiers. Their eggs are creamy white spotted with reddish brown; size .80 x .55 with great variations. Data. - Rockford, Minn., June 12, 1890. Nest made of mud, lined with feathers; placed under the eaves of a freight house.
Range. - West Indies and Central America; accidental on Florida Keys.