Heart-nosed Bat

The Heart-nosed Bat is a large, carnivorous microbat native to East Africa, notable for its distinctive heart-shaped nose-leaf used in echolocation. It inhabits savanna and woodland habitats where it perches low to the ground to ambush insect prey. This species is remarkable for its sit-and-wait hunting strategy and its role as one of the few insectivorous bats that regularly consumes vertebrate prey. It belongs to the false vampire bat family, though it does not feed on blood.

East Africa, primarily Kenya, Tanzania, Ethiopia, Somalia, and parts of Uganda

Distributed across East Africa including Kenya, Tanzania, Ethiopia, Somalia, Uganda, and parts of the Horn of Africa. Range extends through the Rift Valley and surrounding arid to semi-arid lowlands.

Altitude and depth

Typically found at low to moderate elevations, from sea level up to approximately 1500m.

Seasonal movements

No long-distance migration; some local movement between roosts may occur seasonally in response to insect abundance during wet and dry seasons.

Found in dry savanna, open woodland, and acacia scrubland, often near termite mounds, hollow trees, caves, or rock crevices used as daytime roosts. Prefers areas with low vegetation for perch-hunting and open ground for prey detection.

Adaptations to its environment

Possesses large ears and an elaborate heart-shaped noseleaf that enhance echolocation sensitivity for detecting prey movement on the ground. Its broad wings allow for slow, maneuverable flight suited to perch-hunting in cluttered environments.

Listed as Least Concern by IUCN due to a wide distribution range and presumed large population, though localized declines from habitat degradation are possible.

Estimated population

No precise global population estimate exists, but the species is considered common and stable within suitable habitat across its range.

Habitat loss from agricultural expansion, deforestation, and disturbance of roosting sites such as caves and hollow trees are the primary threats. Pesticide use may also reduce insect prey availability.

Diseases and parasites

Like many bats, may host ectoparasites such as mites and bat flies, though specific disease studies on this species are limited.

No species-specific conservation programs exist; protection is indirect through habitat conservation in national parks and reserves within its range countries.

Recommended actions

Continued protection of savanna and woodland habitats, monitoring of roost site disturbance, and further population studies to detect any regional declines.

Fur is grayish-brown to pale gray, with large rounded ears and a prominent heart-shaped noseleaf that gives the species its common name. The wings are broad and rounded, adapted for slow, controlled flight.

Size

Body length approximately 7-8 cm, with a wingspan of around 30-35 cm.

Weight

Adults typically weigh between 25-35 grams.

Distinctive features

Distinguished from related Megadermatidae by its uniquely heart-shaped noseleaf, larger body size compared to most insectivorous bats, and lack of a visible tail.

Differences between males and females

Minimal sexual dimorphism; males and females are similar in size and coloration.

Generally roosts in small groups or pairs, sometimes in slightly larger colonies of up to a dozen individuals in favorable roost sites like hollow trees or rock crevices.

When it is active

Strictly nocturnal, becoming active shortly after dusk and hunting through the night from stationary perches.

Diet

Carnivorous, feeding on large insects such as beetles, crickets, and grasshoppers, as well as occasionally small vertebrates like frogs, lizards, and other small bats.

How it feeds and hunts

Uses a perch-hunting strategy, sitting on low branches or termite mounds and listening for prey movement sounds on the ground before swooping down to capture it.

Communication

Communicates through echolocation calls for both navigation and prey detection, as well as social vocalizations between roost mates.

Interactions with other species

Predators may include owls, snakes, and small carnivorous mammals; the bat also competes with other insectivorous species for prey resources in its habitat.

Role in its ecosystem

Plays an important ecological role as a nocturnal insect and small vertebrate predator, helping regulate arthropod populations within savanna ecosystems.

Breeding is thought to occur once or twice per year, with a single offspring born after a gestation period estimated around 90 days, though exact timing may vary by region.

Raising the young

Females carry and nurse a single pup, which clings to the mother during early development until it is capable of independent flight and foraging.

Maturity and lifespan

Sexual maturity is reached at approximately one year of age; lifespan in the wild is estimated at 5-10 years, with limited data on captive longevity.

Classification

Mammalia > Chiroptera > Megadermatidae > Cardioderma > Cardioderma cor

Scientific synonyms

Megaderma cor (original combination by Peters, 1872)

Recent studies

Recent bioacoustic studies have examined its unique low-frequency echolocation calls used for passive listening during perch-hunting, offering insight into convergent evolution among gleaning bats.

Compared with similar species

Similar in ecology to other members of Megadermatidae like the Greater False Vampire Bat (Megaderma lyra), but distinguished by its unique heart-shaped noseleaf and more specialized ambush hunting behavior.

The Heart-nosed Bat can detect the faint footsteps of insects on the ground using passive listening rather than echolocation alone. It is also known to occasionally prey on other smaller bat species, an unusual trait among insectivorous bats.

Where and how to see it

Best observed at dusk in savanna regions of Kenya and Tanzania near termite mounds or low tree perches; using a bat detector can help identify its distinctive low-frequency calls.

Risks to humans

No notable risk to humans; it does not bite unless handled and poses no known disease transmission threat.