Thailand Roundleaf Bat (Hipposideros halophyllus)


The great Roundleaf bat is similar in appearance to the closely related intermediate Roundleaf bat (H. larvatus). However, the great Roundleaf bat is larger and possesses four, not three, lateral accessory leaflets on each side of the main nose leaf. This bat has a forearm length up to 9.8 cm, and weighs up to 47 g.[2]

Range Description:

This species is known from a few localities in Central and Southern Thailand (Lop Buri, Tha Woong, Khao Sa Moa Khan), further surveys are required to determine if it is in more locations. The two southern localities on the range map may be historical as the entrances to the caves have been blocked, however, it is not known whether the species currently occurs in nearby caves (S. Bumrungsri pers. comm.).
Countries: Native:


 The current total population estimate for the species for the known colonies is 1,000-1,400 individuals (Waengsothorn et al. 2006).
Population Trend: Decreasing

Habitat and Ecology:

 The species requires a very specific roosting habitat of caves with small entrances which are underground, and this type of cave is rare (Waengsothorn et al. 2006). The species does not travel more than 2 km from the cave to forage. It is unlikely that there is any mix between the known populations as the areas between them are rice fields which are unsuitable for the species. The closest populations are more than 150 km apart (Waengsothorn et al. 2006).
Systems: Terrestrial

 Major Threat(s):

There has been a loss of limestone habitat in the area due to limestone mining (S. Bumrungsri pers. comm.). In addition most known populations are outside protected areas and the forest habitat is highly disturbed due to livestock and deforestation (S. Bumrungsri pers. comm.). Known localities are surrounded by rice fields where pesticide use is high. The roosts of the species are disturbed due to harvesting of guano and the species is sensitive to this. It is hunted in some parts of its range for food.

 Conservation Actions:

Surveys are required to determine if the species occurs in additional locations, and areas of suitable habitat require protection (S Bumrungsri pers. comm.).