Onychonycteris known species, hence "Onychonycteris" meaning "clawed bat". The specific epithet is a tribute to the fossil prospector and preparator who discovered it, Bonnie Finney. "Onychonycteris finneyi" was the strongest evidence so far in the debate on whether bats developed echolocation before or after they evolved the ability to fly. "O. finneyi" had well-developed wings, and could clearly fly, but lacked the enlarged cochlea of all extant echolocating bats, closer resembling the old world fruit bats which do not echolocate. This indicates that early bats could fly before they could echolocate. However, an independent evaluation of the "Onychonycteris" reference fossil in
Lesser sac-winged bat the tree canopy. The lesser white-lined bat feeds primarily on aerial insects in the order Hymenoptera. This includes flying ants and formicids. The bats forage in areas under tree canopies and use echolocation to hunt the flying insects. The bats don't change their calling frequency or their mouth size when using echolocation while hunting. When roosting, the bats usually form small groups anywhere from 2 to a 9. Additionally, the bats are thought to be monogamous which is rare for most mammals. Females typically only produce one or two young per year. The young can't fly for about the first