They have specific morphological features such as face with an elongated snout, big eyes, and small ears which are easily distinguished from other bats. This family contains the largest known bat (Pteropus vampires, span 1.7 m) but also relatively small species (Syconycteris hobbit, forearm 50 mm).
Wao kuwa na sifa maalum kubadilika kwa maumbile kama vile uso kwa pua vidogo, macho kubwa, na masikio ndogo ambayo ni urahisi wanajulikana kutoka popo wengine . Familia hili lina inayojulikana bat kubwa (Pteropus Vampires, span 1.7 m) lakini pia aina ndogo (Syconycteris hobbit, forearm 50 mm).