Diadem roundleaf bat  (Hipposideros diadema)

This species is widespread, occurring from Southeast Asia to North Queensland, Australia. It has many subspecies; Hipposideros diadema anderseni (Philippines), H. d. ceramensis (Moluccas), H. d. custos (Kei Islands), H. d. enganus (Sumatra) (5), H. d. inornatus (Northern Territory, Australia) (2), H. d. masoni (Borneo) (6), H. d. natuensis (Natuna Islands and Bunguran Island), H. d. reginae (North Queensland, Australia) (2), and H. d. speculator (Sulawesi) (5).

With a heavy body and long, narrow wings, the diadem roundleaf bat is adept at fast flight but has relatively poor manoeuvring ability. It has adapted to foraging in gaps in forests, such as around tree falls or above rivers. This bat species is not restricted to rainforest and in outback Australia it forages within eucalypt woodland and open forest, deciduous vine thicket and within towns (7). Individuals are known to forage up to two and a half kilometres from the roost during the course of the night (7). During the day it roosts in small groups in caves, old mines and sheds, hollow trees and tree branches (8) (9).