Why is this animal unusual?
Males and females look like different species. The female has a normal fox-like face. The male has a huge boxy head, drooping lips and a voice box so big it fills half of his body.
Why does it look like that?
That swollen snout is full of air chambers that work like the body of a guitar, making his honk louder.
Strangest biological feature
The honk. Each male repeats it 50 to 120 times a minute.
Why is it strange?
Males gather along a river at night, dozens at a time, all honking and flapping. Females fly along the row and choose. A handful of the best singers get almost all of the matings.
Interesting behavioral facts
By day they hang quietly in the treetops; at night they fly long distances looking for fruit.
Records held
The largest bat in mainland Africa.
