Comparatively little is known about the elusive Comoro rousette; however, some studies into its social, roosting and feeding behaviours have been undertaken (3).
Similar to many species of bat, the Comoro rousette roosts in large colonies. Aggregations of this species have been recorded to number between as little as 100 and as many as 13,000 individuals. Within these roosts, the Comoro rousette forms tight clusters containing 50 to several hundred bats. The bats are highly active within the roost, grooming, fighting, spending time scratching, and searching for better positions within the colony (3).
A nocturnal species, the majority of the individuals within the roost do not leave the protection of the cave until just before sunset. The Comoro rousette will spend much of the night foraging and feeding, although some individuals may return to caves early, followed by the remaining colony at sunrise (3).
The Comoro rousette is largely frugivorous; however, flowers and leaves are also included in its diet (3). This species is extremely manoeuvrable, and while foraging for food, the Comoro rousette exhibits unusual flight behaviour, hovering in front of the fruit from which it then feeds. This is fairly rare behaviour for fruit bats as hovering requires large amounts of energy (3).
Not much is known about the breeding biology of the Comoro rousette, although it is likely to be similar to other Roussetus species. The gestation period is likely to be between four and five months, with lactation lasting for a period of about three months. It is possible that the Comoro rousette may give birth more than once a year (4).