Furia horrens (F. Cuvier, 1828), Mana River, French Guiana. In Latin, horrens means "bristle," and, indeed, its muzzle is very bristly.
OTHER COMMON NAMES
English: Thumbless bat, lesser thumbless bat.
The smaller of the two species in this family, it is one of the smallest bats in the Neotropics. Females are significantly larger than males by 10-15%. Body fur is dense, with the fur on the head especially long and thick, enough to almost conceal the mouth. Color of the back varies from fine slate blue to brownish gray, with a paler belly. The ears are dark and stiff, and the snout is black.
Costa Rica to southern Brazil, including Venezuela and Colombia, but not west of the Andes. Also on Trinidad, but no other Caribbean islands.
Most commonly collected in humid lowland rainforest, often near streams. However, some have been netted in village clearings.
Roosts of have been found in caves, hollow trees, and in or beneath fallen rotting logs, all inside forest. Though poorly known and infrequently encountered, studies in French Guiana suggest they can be quite commonly found if roost sites are searched for. It has a wide distribution and is probably more retiring than rare.
Has been observed foraging over the forest floor at heights of 3.2-16.4 ft (1-5 m). The recorded diet consisted solely of small moths. Individuals leave the roost only when darkness is complete.
Roosting aggregations are mostly mixed sex, but all-male groups have been found, suggesting that females may use special sites for raising young. Mating system is not known.
SIGNIFICANCE TO HUMANS None known. ♦
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