| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Chiroptera |
| Family: | Vespertilionidae |
| Genus: | Idionycteris |
| Species: | Idionycteris |
| Binomial Name: | Idionycteris phyllotis |
The Allen's Big-Eared Bat (Idionycteris phyllotis) is a species of vesper bat in the Vespertilionidae family. It can be found in the following countries: Mexico and United States.
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