Akademik

North American swallow that lives in colonies and builds bottle-shaped mud nests on cliffs and walls

: any of a number of chiefly No. American swallows (genus Petrochelidon) that build their bottlelike nests of mud against cliffs or under eaves — called also eaves swallow

any of several North American birds of the genus Hirundo, esp. H. pyrrhonota, that live colonially and build bottle-shaped mud nests on cliffs and walls.

[1815-25, Amer.]

cliff swallow,

a North American swallow that builds a bottle-shaped nest of mud, straw, and feathers, and usually fastens it to a cliff or wall.