By James Lawrence
Geographic Range
Black bearded tomb bats live in Central India, Indochina, Thailand, Borneo, Burma, and the Philippines. Their range includes Indonesia, Bantam, and West Java, and they are occasionally found in the Malay Peninsula, Sumatra, Borneo, and Lombok. (Boonsong and McNeely, 1988; Kunz and Pierson, 1994; Lekagul and McNeely, 1988)
Habitat
Black-bearded tomb bats are found in habitats including rainforests, woodlands, tombs, deserted buildings, rock formations, caverns, cliffs, and arid country plains. They prefer densely sheltered areas. They roost in groups ranging from 200 to 4000 individuals. (Kunz and Pierson, 1994; Lekagul and McNeely, 1988)
These animals are found in the following types of habitat:
temperate
; tropical
; terrestrial
.
Terrestrial Biomes:
desert or dune
; forest
; rainforest
; scrub forest
.
Physical Description
(0.35 to 1.76 oz; avg. 1.06 oz)
(2.76 to 3.15 in; avg. 2.95 in)
The coat of black-bearded tomb bats is quite variable dependent on its particular environment. It ranges from grayish to multi-brown or red variations. Hairs are typically white tipped, turning increasingly more red or brown towards the base. Fur is present on the tail (uropatagium) membrane. No throat sac is present, but a series of pores that open into the throat region is present where the sac would be located. Males have a black beard, which is believed to be seasonal. In the mating season, males produce a thick substance into the beard that is believed to be a form of pheromone to attract mate. The thick tail tapers to a slightly bulbous tip. The wings attach just above the ankles.
These bats are strong fliers that can reach recorded heights of 90 meters.
The dental formula is 1/2 1/1 2/2 3/3. (Kunz and Pierson, 1994; Lekagul and McNeely, 1988)
Some key physical features:
endothermic
; homoiothermic; bilateral symmetry
.
Reproduction
These animals breed once per year.
Breeding occurs during the winter.
Information on mating systems is not available.
The mating season lasts for only a few weeks in the winter. The female gives birth to one live infant sometime in early spring. (Hill and Smith, 1986; Kunz and Pierson, 1994; Lekagul and McNeely, 1988)
Key reproductive features:
iteroparous
; seasonal breeding
; gonochoric/gonochoristic/dioecious (sexes separate); sexual
; fertilization
; viviparous
.
The young nurse for approximately 2 months, though they remain in their colony for life. A young reaches sexual maturity very quickly; young are able to fly and care for themselves as a nearly full grown adult by August-September. The care of the infant is the responsibility of the female. Weaning takes place when the young is around 2 to 3 months old. (Boonsong and McNeely, 1988; Hill and Smith, 1986; Kunz and Pierson, 1994)
Parental investment:
altricial
; pre-fertilization (provisioning, protecting: female); pre-hatching/birth (provisioning: female, protecting: female); pre-weaning/fledging (provisioning: female).
Lifespan/Longevity
Little is known about the longevity of these animals, but approximate ages for individuals vary from 5 to 20 years. Infant mortality within this species is particularly high. (Boonsong and McNeely, 1988; Kunz and Pierson, 1994)
Behavior
Within roosts males have been known to form a protective circle around the female and young. Each male has a particular area, which it occupies; this implies a social hierarchy in the colonies. In some cases there are strictly male or female colonies found in roosts (mainly after the mating season). These bats tend to scream a very piercing, high-pitched noise when being captured, in danger, or injured. (Boonsong and McNeely, 1988)
Home Range
The home range size of these bats has not been reported.
Key behaviors:
flies; nocturnal
; motile
; sedentary
; territorial
; social
; colonial
; dominance hierarchies
.
Communication and Perception
Information on the communication of these animals is not available. However, tactile communication is obviously important between mothers and their offspring. Some vocal and chemical communication probably occur and help mothers to identify their own offspring in the roost.
Food Habits
Taphzous melanopogon feeds primarily on flying insects, although it also sometimes feeds on small fruits. It hunts by echolocation, emitting a "click" or "tic" that can be faintly audible to humans. (Boonsong and McNeely, 1988)
Primary Diet:
carnivore
(insectivore
).
Animal Foods:
insects.
Plant Foods:
fruit.
Predation
- larger bats (Chiroptera)
- baboons (Papio)
- crows (Corvus)
- owls (Strigiformes)
There are not many predators of black bearded tomb bats. However, larger bats, crows, owls and monkeys have been known to prey upon this species.
Ecosystem Roles
Black-bearded tomb bats help control insect populations, and those that feed on fruit may pollinate plants or disperse seeds. (Kunz and Pierson, 1994)
Key ways these animals impact their ecosystem:
disperses seeds; pollinates.
Economic Importance for Humans: Negative
In September of 1998, a disease called the Nipah virus that infected bat populations of Malaysia was responsible for the deaths of approximately 105 humans, and over 1 million pigs. Black-bearded tomb bats were believed to be a host, though no cases were found within captured individuals. ("Nipah Virus Infection in Bats (Order Chiroptera) in Peninsular Malaysia", 2001)
Ways that these animals might be a problem for humans:
causes or carries domestic animal disease
; household pest.
Economic Importance for Humans: Positive
These bats may have some economic importance to humans by helping to polinate crops and helping to control insect pests.
Ways that people benefit from these animals:
pollinates crops; controls pest population.
Conservation Status
IUCN Red List: [link]:
Lower Risk - Least Concern.
US Migratory Bird Act: [link]:
No special status.
US Federal List: [link]:
No special status.
Though not endangered, black-bearded tomb bats areprotected by the Zoological Park Organization of Thailand. (Zoological Park Organization of Thailand, 2000)
Other Comments
Black bearded tomb bats are agile creatures. They cling to vertical surfaces, as well as effortlessly crawling up and down porous surfaces like rock walls and cave crevices. (Kunz and Pierson, 1994)
Contributors
James Lawrence (author), University of Michigan.
Kate Teeter (editor), University of Michigan.
Nancy Shefferly (editor), Animal Diversity Web Staff.

