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Eumops bonariensis

Dwarf Bonneted Bat

Order: Chiroptera
Family: Molossidae

Image of Eumops bonariensis
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Conservation Status: Least Concern.

Many bat vocalizations are ultrasonic, beyond the range of human hearing, but people can hear this small bat’s high-pitched chatter whether it is resting or flying. It roosts in holes in trees and also in roof tiles. A number of bats that were caught, banded, and released were caught again returning to the same roof, suggesting that when they have chosen a roosting site, they stick with it.

This bat’s ears are as broad as they are long, and if stretched forward, reach beyond its nose. Bats use the signals that bounce back from their echolocation calls to avoid obstacles when they are flying and to pinpoint the location of flying insect prey; many have large ears with which to hear these echoes.

Range: Head and Body: 49-68 mm; Tail: 28-47 mm

Range: 7-13 g


Peters, W., 1874. Monatsberichte Koeniglich Preussiche Akademie Der Wissenschaften. Berlin. 1874:232.


Mammal Species of the World

Distribution of Eumops bonariensis