Daily activities, parturition, social interactions and feeding of the African fruit bat, Epomophorus wahlbergi, was studied in the field. The animals consume various fruits, and they chew down - though do not swallow - older Balanites leaves that contain components of steroid hormones.
The long and conspicuous call sequences of males uttered at dusk and dawn follow an individual rhythm which - an exceptional case among animals - is not based on an underlying rhythmic pace-setter process but on a stochastic process which is reset to start by every call.	Calling male with white epaulets fully everted    © Seibt
Calling males space out, as the individual calling rythm is disturbed by acoustic interference from other males calling within 30 m distance.

Literature
Wickler, Wolfgang & Seibt, Uta 1976: Field studies on the African fruit bat Epomophorus wahlbergi (Sundevall), with special reference to male calling. Zeitschrift für Tierpsychologie 40, 345-376

Wickler, Wolfgang & Seibt, Uta 1975: Gegenseitige Störung balzender Männchen eines Epaulettenflughundes. Naturwissenschaften 62, 442-443

Wickler, Wolfgang und Seibt, Uta 1974: Doppelklick-Orientierungslaute bei einem Epauletten-Flughund. Naturwissenschaften 61, 367