MorphologyRead full entry
As their common name implies, P. auritus have large ears--almost as long as their bodies. When in flight, the bats hold the ears fully erect and extended forward. At rest, their ears fold and curl sideways in a way that resembles ram horns. During hibernation the bats fold and tuck ears down, so that only the long pointed ear cover is visible.
P. auritus have relatively large eyes without a tapetum lucidum, and slit-shaped nostrils that open laterally. They usually weigh 6-12 grams and females are slightly larger than males. They have long, silky fur that is brownish on the upper side and grayish brown below. The dental formula for the P.auritus is 2/3, 1/1, 2/3, 3/3=36.
(Grzimek, 1975; Howard, 1995; Swift, 1998)
Range mass: 6 to 12 g.
Average mass: 8 g.
Other Physical Features: endothermic ; bilateral symmetry
Average basal metabolic rate: 0.082 W.