The Streak-throated Swallow has a glossy blue-black back and brown streaks on the throat and breast. It gathers near water and catches small insects in flight.
Adults have glossy blue-purple upperparts, a chestnut forehead and crown, brown streaks on the throat and breast, and pale buff-white underparts. Juveniles are duller and browner.
It perches in flocks on wires and roosts communally with other swallows. Near water, it catches small flying insects such as midges and gnats.
An extinction-risk assessment has not been added yet.