White-throated Round-eared Bat

Fascinating facts about the White-throated Round-eared Bat

• This bat produces ultrasonic calls at frequencies between 50 and 100 kHz — high enough that some are inaudible even to humans wearing headphones — and uses the returning echoes to paint a sonic picture of insects mid-flight accurate to within millimetres. The bat's rounded ears act like satellite dishes, swivelling independently to triangulate sound with such precision it can distinguish a mosquito from a moth in complete darkness.
• At just 6 grams — lighter than a coin — the white-throated round-eared bat burns through food so quickly it must consume roughly 30% of its body weight each night. Imagine a 70-kilogram human eating 21 kilograms of food before dawn. This metabolic furnace means the bat hunts almost constantly from dusk until the insects vanish with the first light.
• Unlike most bats that roost in caves or tree hollows, this species roosts inside tents it builds by biting half-moons into the leaves of rainforest plants, folding them like origami to create a shelter the size of a closed fist. A single bat may cut and construct a new tent within minutes, abandoning old ones to avoid parasites — behaviour so specialised it appears in almost no other bat species.
• The white-throated round-eared bat hunts not only insects but also feeds on fruits and seeds from rainforest plants, then disperses the seeds through its droppings across distances up to a kilometre away. In doing so, this 6-gram bat inadvertently plants trees that shade the very understory where its insect prey shelter — a hidden architect of forest structure.
• Male white-throated round-eared bats possess large glands on their shoulders that produce a pungent secretion used to mark females and territories, creating scent-marked zones in the rainforest that persist for hours and guide mating behaviour. This chemical language allows bats to communicate across distances their voices cannot reach through the dense foliage.

At a glance

About the White-throated Round-eared Bat

In the twilight depths of the tropical forest, the White-throated Round-eared Bat emerges as a phantasmal figure, its delicate, rounded ears twitching with every nuance of sound as it navigates the shadows. With a flutter of leathery wings, it dances through the underbrush, its large eyes shining like dark jewels as it pursues the faint whispers of insect prey. As it flits and weaves, its pale throat patch glows like a tiny lantern, illuminating the secret world of this enigmatic, nocturnal hunter.

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