You searched for: “vespertilionidae
Vespertilionidae (pl) (noun)
1. Cosmopolitan family of mainly insectivorous microchiropteran bats containng about 280 species; habits solitary to gregarious, often migratory; some species hibernate.
2. A large, widely distributed family of insectivorous bats of the suborder Microchiroptera, characterized by a long slender tail and well-developed ears.
The Bat

Myself, I rather like the bat,
It's not a mouse, it's not a rat.
It has no feathers, yet has wings,
It's quite inaudible when it sings,
It zigzags through the evening air
And never lands on ladies' hair,
A fact of which men spend their lives
Attempting to convince their wives.
—Ogden Nash
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