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This one its an inative female, adult. The forearm have 41,3mm.
This specimen was caught in an edge of a river, on an island in the middle of the river that across my city, a region of transiiton between the Cerrado and Atlantic Forest.
I starts my own researches with bats. It's a survey of species caught along the river that across my city. That's one it's a Vespertilionidae. This species feeds of insects and use its uropatagium (the skin between the legs) to catch insects in the air and takes them to mouth.