Genus Hipposideros the Roundleaf Bats
The Bicolored Roundleaf Bat (Hipposideros bicolor)
Sundevall's roundleaf bat (Hipposideros caffer)
Fawn-leaf Roundleaf Bat (Hipposideros cervinus)
Ashy Large-eared Roundleaf Bat (Hipposideros cineraceus) Shield-faced Roundleaf Bat (Hipposideros lylei)
Cantor's roundleaf bat (Hipposideros galeritus)
Bicolored Roundleaf Bat (Hipposideros bicolor)
The Bicolored Roundleaf Bat (Hipposideros bicolor) is a species of bat in the family Hipposideridae found in Indonesia, Malaysia, the Philippines, Thailand, and Timor-Leste. This bat inhabits caves, rock crevices and tunnels among lowland forests. They roost in large numbers and consume mostly small winged insects. Their navigation and hunting skills come from the use of echolocation. Its leafnose is used to release ultrasonic shouts to distinguish its surroundings. Echolocation is also used to distinguish other species based on their wingbeat and size. The habitat of this bat decides the color of its fur. Bleaching fumes of a cave environment will cause an orange colored fur. Those who inhabit a well-ventilated roost will be a light brown color.
It was described as a new species in 1834 by Dutch zoologist Coenraad Jacob Temminck. Temminck placed it in the genus Rhinolophus with a binomial of R. bicolor. The bicolored leafnose bat has four subspecies: Hipposideros bicolor atrox, Hipposideros bicolor major, Hipposideros bicolor bicolor and Hipposideros bicolor erigens.
In West Malaysia, researchers have found two different groups of bicolored roundleaf bats. These seemingly identical groups are distinguished by their size and echolocation frequency. The first group has a more rounded wingtip due to its smaller weight and shorter wider wing. It also has an echolocation call between 127.0 and 134.4 kilohertz. The second group has a smaller tibia length but weighs more with larger wings. Their echolocation call ranges from 138.0 to 144.0 kilohertz. Researchers conclude that the first group's body composition may be more suited for better flight agility and hunting in cluttered spaces.
The bicolored roundleaf bat is found in Southeast Asia where its range includes Indonesia, Malaysia, the Philippines, Thailand, and Timor-Leste. It has been documented at elevations up to 600 m (2,000 ft) above sea level. Hipposideros bicolor atrox is documented in southern Thailand to Sumatra. Hipposideros bicolor major located in Enggano Islands and Nias. Hipposideros bicolor bicolor inhabits in Java stretching to the Lesser Sunda Islands and Borneo. Hipposideros bicolor erigens lives solely in the Philippines.
Bicolored Roundleaf Bat (Hipposideros bicolor) Koh Lanta Island Thailand
Sundevall's roundleaf bat (Hipposideros caffer)
Sundevall's roundleaf bat (Hipposideros caffer), also called Sundevall's leaf-nosed bat, is a species of bat in the family Hipposideridae.
These bats are very similar in appearance to the closely related Noack's roundleaf bat, and the two have in the past been considered to be the same species. Although more recent research suggests that they are distinct, taken together, they possibly represent a species group containing a number of cryptic species or subspecies that have yet to be distinguished.
Sundevall's roundleaf bat is a medium-sized bat, with a head-body length of 8 to 9 cm (3.1 to 3.5 in), and a wingspan of 20 to 29 cm (7.9 to 11.4 in). Adults have a body weight of 8 to 10 g (0.28 to 0.35 oz). They have long fur, which may be either grey or a bright golden-orange in colour, and brown wings. The fur is generally paler on the underside of the body.
The bats have large, rounded, ears with a well-developed antitragus, and a horseshoe-shaped nose-leaf, with a distinctive small projection on either side. There is also an additional serrated ridge of skin behind the main nose-leaf. Both females and males have an extra pair of teats in the pubic region. Although these are vestigial in the males, they can be as long as 4 cm (1.6 in) in some females (almost half the body length), yet are never functional. These false teats may be only present to allow the young something to hold on to while clinging to their mothers.
Sundevall's roundleaf bat is a relatively common species, and is found in almost every African country south of the Sahara, as well as in Morocco, Yemen, and parts of Saudi Arabia. Four subspecies are currently recognised, although the precise geographic range of each is not yet clear:
H. c. angolensis
H. c. caffer
H. c. nanus
H. c. tephrus