- chimney swift, chimney swallow, Chateura pelagica - American swift that nests in e.g. unused chimneys
--1 is a kind of swift
--1 is a member of Chateura, genus Chateura - barn swallow, chimney swallow, Hirundo rustica - common swallow of North America and Europe that nests in barns etc.
--2 is a kind of swallow
--2 is a member of Hirundo, genus Hirundo