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
Argentine brown bat Their diet will change slightly depending of the season of the year, whether it is the rainy or dry season. like other bats the Argentina brown bat hunts for its food using echolocation near streams and small bodies of water. their diet consist of various types of moths, some beetles, butterflies. One threat to the Argentine brown bat is insecticides that are encountered through ingestion of sprayed insects and plants which the insects eat. The Argentine brown bat is known to be able to reproduce year round, most tropical species of bats do not hibernate or use torpor in off