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