Frequently associated with Bank Swallows yet far less common and generally only several pairs nest together. Their flight is more sedate than others of the family; changing their course is accomplished by curves — not abrupt angles. This peculiar flight enables an observer to separate them from Bank Swallows and is a better identification method than their slightly larger size.
Occasionally they nest under bridges in Phoebe company with whom they are on friendly terms –– a rather curious exhibition of tolerance for an outsider but none for another of its own kind, for I have never seen two pairs of Phoebes under the same roof.
Temperate North America from southern New England, north central states west to British Columbia, southward. More numerous altho extremely local in northern part of its range.