Definition of cliff swallow
: a colonial swallow (Petrochelidon pyrrhonota) of the New World with a pale buff rump and dark throat patch that builds mud nests resembling jugs especially under eaves and on cliffs
First Known Use of cliff swallow
Learn More about cliff swallow
Britannica.com: Encyclopedia article about "cliff swallow"
Seen and Heard
What made you want to look up cliff swallow? Please tell us where you read or heard it (including the quote, if possible).