The striated swallow is 19 cm long with a deeply forked tail. It has blue upperparts other than a reddish collar (sometimes absent) and streaked chestnut rump.
The striated swallow measures 19 cm in length, featuring a tail that tapers sharply at the end. Its upper parts are predominantly blue, with an occasional reddish collar (which may be absent), and it has a chestnut-colored rump marked by streaks.