Chestnut sac-winged bat
Cormura brevirostris is a bat species from the family of Myotis bats free- tails ( Emballonuridae ), which is native to Central America. It is the only species of its genus.
The genus name is derived from the Greek Cormura Kormos ( " stump " ) and oura ( "tail "). The Latin species name brevirostris is composed of the parts brevis ( " short") and rostrum ( "face" ) together.
Description
Cormura brevirostris is a small bat with a head -body length of an average of 69.1 mm for females and 66.3 mm in males, and a weight of 7-11 g The soft, dense fur is of a deep black-brown, often with a reddish tint. It is the only bat species of Myotis bats free - tails, their bag-like structure of the male sits in the middle of the wing membrane between upper arm and forearm, while the wing pockets of other Myotis bats free- tails are closer to the body. In females the wing pockets are only rudimentary. The free end of the tail is only 1-3 mm long.
Way of life
Cormura brevirostris is like most bats nocturnal. She hunts in the dense forest of vacancies under the canopy and in clearings for insects. The echolocation calls consist of three single tones, the first tone has an average frequency of 25.4 kHz and the following two notes are both 2-3 kHz higher. The duration of each tone is in each case 5-10 ms. During the day, hanging groups of 2-5 animals in tree holes and under fallen trees, as well as bridges. The animals form a dense cluster in which touches the back of the next of the stomach of an individual. The groups never made several females usually consist of several males, however. At the same slope squares are sometimes found also colonies of the great sac-winged bat. In Panama, pregnant females were caught in April and May, but no longer from June. In contrast, it has been observed in French Guiana pregnant females in August and September, so it is assumed that the mating seasons differ regionally. Gestation period and litter size are unknown.
Distribution and habitat
Cormura brevirostris is widespread in Central America from Nicaragua and to the south of Panama, and in South America in the Amazon Basin. Your stock is classified by the IUCN due to the widespread than safely.