The only other member of the subfamily is the white-eyed river martin Pseudochelidon sirintarae, known only from one site in Thailand and possibly extinct.

The only other member of the subfamily is the White-eyed River Martin Pseudochelidon sirintarae, known only from one site in Thailand and possibly extinct.

The IUCN does not consider a species extinct until extensive targeted surveys have been conducted, but the White-eyed River Martin may well no longer exist in the wild.

This is the only known site for the white-eyed river martin which used to winter there, but has not been seen since 1980, and may be extinct.