Range. - United States, breeding from Mexico north to southern New England, Manitoba and British Columbia; winters south of our borders.

This species is slightly larger than the last and similar but with the throat and breast grayish and with the outer web of the outer primary provided with recurved hooks. They nest in holes in embankments, in crevices in cliffs or among stones of bridges or buildings. Their eggs are like those of the Bank Swallow but average a trifle larger; size .75 x .52.

White

White.

White

White.

617 Rough Winged Swallow Stelgidopteryx Serripenni 1237