Maroon sack-winged bat
| Maroon sack-winged bat | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name of the genus | ||||||||||||
| Cormura | ||||||||||||
| Peters , 1867 | ||||||||||||
| Scientific name of the species | ||||||||||||
| Cormura brevirostris | ||||||||||||
| ( Wagner , 1843) |
The chestnut sack- winged bat ( Cormura brevirostris ), also known as Wagner's winged-pocket bat , is a species of bat from the family of the smooth-nosed free-tailed bat (Emballonuridae), which is native to Central America. It is the only species in its genus.
The generic name Cormura is derived from the Greek kormos ("stump") and oura ("tail"). The Latin species name brevirostris is made up of the parts brevis ("short") and rostrum ("face").
description
The chestnut sack-winged bat is a small bat with an average head-trunk length of 69.1 mm in females and 66.3 mm in males, and a weight of 7 to 11 g. The soft, dense fur is deep black-brown, often with a reddish tinge. It is the only bat species of the smooth-nosed free-tails whose sac-like structure of the male sits in the middle of the flight membrane between the upper and forearm, while the wing pouches of other smooth-nosed free-tails are closer to the body. In females, the wing pouches are only rudimentary . The free end of the tail is only 1-3 mm long.
Way of life
The chestnut sack-winged bat, like most bats, is nocturnal. It hunts for insects in the dense forest in open places under the treetops and in clearings. The echolocation calls consist of three individual tones, the first tone having an average frequency of 25.4 kHz and the following two tones each 2-3 kHz higher. The duration of the individual tones is 5–10 ms each. During the day, groups of 2 to 5 animals hang in tree holes and under fallen trees, as well as on bridges. The animals form a dense cluster in which the belly of one individual touches the back of the next. The groups usually consist of several males, but never of several females. Colonies of the sack-winged bat are sometimes found in the same hanging places . In Panama , pregnant females were caught in April and May, but not from June. In contrast, pregnant females were observed in French Guiana in August and September, which is why it is assumed that the mating seasons differ regionally. Gestation time and litter size are unknown.
distribution and habitat
The chestnut sack-winged bat is common in Central America from Nicaragua or in the south of Panama , as well as in South America in the Amazon basin . Thanks to its widespread use, the IUCN classifies its population as safe.
Web links
literature
- E. Bernard (2003): Cormura brevirostris , Mammalian Species 737: pp. 1-3