Common/Egyptian slit-faced bat (Nycteris thebaica)

The common slit-faced
bat.
Identification pointers
The large ears (28-37 mm) are conspicuous and this species is by
far the most common of the genus in South Africa. A light brown colour
above with creamy white below and light wing membranes can make it
noticeable when foraging, which they do in a fluttering but extremely
agile fashion.
Forearm: 37-51 mm; mass 7-15 grams.10
Roosting habits
They are hollow roosting and may spend the day in road culverts,
tree hollows (especially hollow baobabs), in open basements, under
raised houses, aardvark burrows, caves, mine addits and sometimes
temporarily vacant buildings or structures. Colony sizes are usually
small, numbering only up to a few dozen, but they commonly reach
hundreds when suitable roosting space like a cave is available.
At night they tend to rest in a different shelter for short
periods while devouring a captured prey. This resting shelter is called
a night roost and may include any overhanging structures such as
thatched lapas or verandas. The night roosts of this species are
clearly marked by the wings of moths and other insects scattered across
the ground, as they devour the soft bodies and discard the insect
wings. As a result of this habit their diet can be easily
studied.
Breeding
Females give birth once a year in November to a single
young10, with lactation lasting about two months. The tiny
youngster is carried around in flight by its mother, clinging to one of
her nipples.8
Food
Their diet is very adaptable and they may forage on whatever insects are readily available. In addition to this they have the ability of gleaning, which means that they are capable of capturing non-flying prey from leaves or the ground. They use their long ears to listen for scuffling noises made by insects or the calls of crickets and a wide variety of insects and other invertebrates have been recorded in the diet, including crickets, grasshoppers, katydids, beetles, cockroaches (very handy indeed), moths, lacewings, spiders, flies, termites, mantises, and scorpions. In dry months even small frogs, fish and vegetative matter have been recorded so their diet is very adaptable indeed.8, 10



