Eptesicus taddeii is a species of medium-sized bat

Bat

Bats are mammals of the order Chiroptera "hand" and pteron "wing") whose forelimbs form webbed wings, making them the only mammals naturally capable of true and sustained flight. By contrast, other mammals said to fly, such as flying squirrels, gliding possums, and colugos, glide rather than fly,...

 belonging to the family Vespertilionidae. It is restricted to the Atlantic Forest of southern Brazil

Brazil

Brazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...

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This newly discovered species, which has a total length of up to 120 mm, is most similar to Eptesicus brasiliensis but can be distinguished from that species by its more robust appearance, redder colouring, larger muzzle and rounder-shaped ears.

The specific name honours the Brazilian zoologist Valdir Antônio Taddei.