Thumbless bat


The thumbless bat is a species of insectivorous bat in the family Furipteridae, in the monotypic genus Furipterus. It is found in Costa Rica, Brazil, Venezuela; Colombia; Ecuador; Suriname; French Guiana; Guyana; Panama; Trinidad, and Peru. They have a small thumb which is included in the membrane of the wing, causing the 'thumbless' appearance.

Taxonomy

The thumbless bat belongs to the family Furipteridae which is currently composed of only two genera: Amorphochilus and Furipterus. Both genera are monotypic.
The first description of the species was proposed by Frédéric Cuvier in 1828, separating the taxon to a new genus Furia. The taxon was reassigned to Furipterus in 1839 by Charles Bonaparte.

Geographic Range

The thumbless bat is found in Central and South America. Its range includes Costa Rica, Panama, southern Brazil and Bolivia. In Brazil, it was recorded in 12 different regions covering the Amazon, Caatinga, Cerrado and Atlantic Forest biomes.

Population

Its populations are rare and very local, but widespread.
Male and female bats may live separately during some parts of the year. There were found more than 60 males occupying one hollow.

Habitat

The thumbless bat is found in caves. Additionally, it is associated with moist environments. Thumbless bats were detected significantly more frequently over large lakes. The moist habitat plays a key role for aerial insectivorous bats. However, thumbless bat's activity is significantly higher in forest compared to the lakes.
They roots in small clusters in colonies for up to 60 individuals in caves. The nests are located in deep cracks between rocks.

Diet

Thumbless bats are aerial insectivorous bats.