Geoffroy's Bat

About the Geoffroy's Bat

Geoffroy's bat (Myotis emarginatus), also known as the notch-eared bat, is a species of vesper bat. M. emarginatus is a medium-sized bat with long and woolly fur. The dorsal side of the torso is rust-brown to fox-red and the ventral side is a poorly delineated pale yellowish-brown. The young animals are almost fully grey. The face is light brown. The ears are brown and they have an almost right-angled notch at the outer edge and many scattered, wart-like growths on the auricle. The tip of the tragus does not reach the notch on the edge of the ear. The wings are brown and broad. The edge of the tail membrane is supported by a straight calcar and part of it has short, straight and soft hairs.

Geoffroy's bat feeds primarily on spiders and flies. Geoffroy's bats in southern Belgium feed primarily on blood-feeding muscid flies, primarily the stable fly and the face fly, which collectively made up up to 72% of their diet in some areas. The other primary element of their diet are web-building spiders, which make up an increased portion of their prey in areas where suitable flies are absent. Most spiders consumed by Geoffroy's bats are of the family Araneidae... Wikipedia →