Rousettus amplexicaudatus

Habitat. Primary and secondary forests, mixed agricultural land (orchard), and open areas, from sea level up to elevations of ¢. 2200 m. Geoftroy’s Rousette also occurs in residential areas up to elevations of ¢. 500 m.

Sumber: Pteropodidae

Movements, Home range and Social organization. Geoffroy’s Rousette roosts in large colonies of 2000 - 100,000 individuals. On the Island of Samal (Philippines), the world’s largest colony of Geoffroy’s Rousette was estimated at ¢. 883,000 individuals in the first 100 m of a 150 m-long cave (Monfort Cave). It often roosts in association with other fruit bats such as the Lesser Dawn Bat (Eonycteris spelaea). A capture-recapture study suggested that individuals have large home ranges. Geoftroy’s Rousettes regularly fly long distances (more than 20 km / night) to forage. Genetic studies based on allozymes showed little genetic differentiation among populations in the Philippines, indicating high dispersal ability.

Sumber: Pteropodidae

Status and Conservation. Classified as Least Concern on The IUCN Red List. Geoffroy’s Rousette is widespread, with common and abundant populations, and seemingly not declining at a fast rate. Nevertheless, it is heavily hunted in South-east Asia, Borneo, and the Philippines and regarded as a pest in parts ofits distribution.

Sumber: Pteropodidae

Descriptive notes. Head — body 128 - 154 mm, tail 13 - 24 mm, ear 16 - 5 - 24 mm, hindfoot 19 - 21 mm, forearm 70 - 92 mm; weight 64 - 106 g. Males are always larger on average than females. Geoffroy’s Rousette is similar to Leschenault’s Rousette (R. leschenaultii), distinguished by subcircular (as opposed to elliptical) occlusal outline of M ,, narrower ears, and proportionally more slender and shorter rostrum. Ears are narrow, tips are not attenuated, and antitragus is small and round. Fur coloris similar to that of other species of Rousettus: generally brown and grayish drab on chest, breast, and belly. It has been suggested that darker hue might be useful to distinguish Geoffroy’s Rousette from other eastern species of Rousettus. Head, back, and rump range from dark brown to dark olive or sepia-brown; nape is wood-brown to greenish brown; sides of neck and fore neck are more or less suffused with wood-brown or tawny olive in males and greenish brown in females. Distinct band of dorsal fur, 15 - 35 - 5 mm wide, occurs between both plagiopatagium insertions. Furis rather short and sparse. Neck region is almost naked. Uropatagium and tibia are almost bare. Adults of both sexes can have two bright-colored and bristly hair tufts, one at either side of neck; these tufts occur especially in older specimens and are often absent, without geographical regularity. Wing membranes are dark brown but are nearly translucent over bones giving appearance of white stripes. Claw is present on index finger. Palatal ridges are variable depending on subspecies: 3 + 4 + 1,4 + 3 + 1,0 or 4 + 4 + 1 (less commonly). Dental formula for all species of Rousettusis 12 / 2, C 1 / 1, P 3 / 3, M 2 / 3 (x 2) = 34. Dentition is conservative in tooth number and structure of dental pieces. There is a tendency in Geoffroy’s Rousette for reduction of interspace between C' and P? % P! in some individuals is closely wedged between those two teeth (absent in a few individuals); this characteristic is variable, without correlation to geography. Premolars and molars vary in size but are similar to those of Leschenault’s Rousette. Chromosomal complement has 2 n = 36 and FN = 68.

Sumber: Pteropodidae

New records Lampung Province: Lombok Village, Sukabanjar Village, Sukaraja Village, Sumber Rejo Village, Way Canguk Forest. Previous records from Sumatra West Sumatra: Mentawai Islands; Bengkulu Province: Enggano Island; Lampung Province: Kalianda (Rookmaaker and Bergmans, 1981).

Sumber: A recent bat survey reveals Bukit Barisan Selatan Landscape as a chiropteran diversity hotspot in Sumatra

Recorded at: Pahang: Krau Wildlife Reserve [11], Gunung Brinchang, [23]; Selangor: Batu Caves [23], Bukit Kutu Wildlife Reserve [51], Ulu Gombak [53, 54]: Kedah: Pulau Langkawi [23], Ulu Muda Forest Reserve [57]; Perak: Temengor Forest Reserve [47], Selama [49]; Melaka: Unspecified [68].

Sumber: A checklist of the bats of Peninsular Malaysia and progress towards a DNA barcode reference library