Fawn roundleaf bat

A communal rooster, is commonly found roosting in caves and trees. In 1958 Medway estimated the Niah population to be 250,000. Hipposideros cervinus is recorded roosting at caves and abandoned mines in groups of individuals that suspend themselves separately, rather than huddling together, and are found cohabiting with other species of hipposiderid bats. They forage in a variety of habitat, from dense rainforest to open woodland in savannah landscapes. Their prey are mid-sized insects caught in flight close to low vegetation, over water and near to the ground. They fly at slow speed and with a high degree of manoeuvrability while foraging for invertebrates such as beetles and moths, allowing them to hunt at low altitudes and make sudden changes in direction to catch its prey. H. cervinus are recorded as hunting in small groups, Reproduction is a single birth during November to December. Juveniles attach themselves to their mother by clasping her ventral side with their head facing away, maintaining this position whether she is at the roost or in flight, but turn in the other direction to receive food from their mother.

Hipposideros cervinus is widespread in a region extending from the Malay Peninsula and on larger and smaller islands in the territories of Indonesia and New Guinea. The species occurs at altitudes from sea level up to 1400 metres asl. The distribution range includes the Torres Strait island to the northeast of Australia and extends to a few records on the mainland, east of Cape York and near the town of Coen, Queensland.

The IUCN Red List assessed the conservation status as least concern in 2008, noting a presumably large and widespread population that is tolerant of some ecological alterations to its environment. Hipposideros cervinus is assumed to be vulnerable to the large scale clearing of forest in the region, although the population trend is unknown. A regional assessment of H. cervinus in the Australian state of Queensland listed the species as vulnerable to extinction. It was previously found in Singapore, but may have become extinct there.