vespertilionid
‘any of various widely distributed insect-eating bats of the family Vespertilionidae, characterized by a long tail’
Lexical development traced from the Tamil root:
N.Lat. vespertiliōnidae < vespertiliō < Lat. vespertilio < vesper < Gk. hesperos ‘the evening (star)’ < wes-pero- ‘evening, night’ < wes < wes- < Tamil ava