Dayak fruit bats
| Dayak fruit bats | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Dyacopterus | ||||||||||||
| Andersen , 1912 |
Dayak fruit bats ( Dyacopterus ) are a genus in the genus group of short-nosed fruit bat with three species that occur in Southeast Asia .
features
The common Dayak fruit bat, which has long been listed as the only species of the genus, has a head body length of 110 to 150 mm, a tail length of 13 to 18 mm, a forearm length of 76 to 92 mm and a weight of 70 to 100 g. The species Dyacopterus rickarti , newly described in 2007, is larger and heavier with a weight of 138 to 148 g. The fur is dark gray-brown to black on the back and head, while the underside is lighter in color. In the common Dayak fruit bat, the shoulder region has a yellow shade.
Types and distribution
The genus includes the following species:
- The Brooks Dayak fruit bat ( Dyacopterus brooksi ) is endemic to Sumatra . It was considered a subspecies of the common Dayak fruit bat until the beginning of the 21st century.
- Dyacopterus rickarti occurs on the Philippine islands of Luzon and Mindanao .
- The distribution area of the common Dayak flying fox ( Dyacopterus spadiceus ) extends from the Malay Peninsula via Sumatra and Borneo to the Philippines .
Way of life
The behavior is mainly known for the common Dayak fruit bat. Presumably the other species have a similar way of life.
These fruit bats usually stay in the treetops and fly above the forests, making them difficult to examine. They form smaller groups at the resting place and are nocturnal. Caves or tree hollows serve as sleeping places. The males of the common Dayak flying fox have glands with milk flow. However, it is debatable whether this milk is used to raise the young or whether it is a form of galactorrhea . Examined females of Dyacopterus rickarti were pregnant with one young. In the common Dayak fruit bat, a litter can consist of two offspring.
status
Dayak flying foxes are threatened by hunting, deforestation and uncontrolled fires. The IUCN lists the Brooks Dayak flying fox as Vulnerable and the common Dayak flying fox in the early warning list (Near Threatened) . Dyacopterus rickarti has not yet been classified.
Individual evidence
- ↑ a b c d Ronald M. Nowak: Dyak Fruit Bat Walker's Mammals of the World. Volume 1. pp. 288-289, 6th edition. Johns Hopkins University Press, Baltimore MD et al. 1999, ISBN 0-8018-5789-9 .
- ↑ a b c Heaney et al .: Dyacopterus rickarti ( en ) In: Synopsis of Philippine Mammals . The Field Museum, Chicago. 2010. Accessed December 8, 2017.
- ↑ Don E. Wilson, DeeAnn M. Reeder (Ed.): Mammal Species of the World . A Taxonomic and Geographic Reference . 3. Edition. tape 1 . Johns Hopkins University Press, Baltimore 2005, ISBN 0-8018-8221-4 (English, Dyacopterus [accessed December 8, 2017]).
- ↑ Helgen et al. (2007): TAXONOMY AND NATURAL HISTORY OF THE SOUTHEAST ASIAN FRUIT-BAT GENUS DYACOPTERUS (abstract), Journal of Mammalogy, Retrieved December 8, 2017.
- ↑ a b Andre Bourassa: Dyak fruit bat on the University of Michigan Museum of Zoology's Animal Diversity Web. Retrieved December 8, 2017.
- ↑ Dyacopterus in the IUCN Red List of Threatened Species 2016. Accessed December 8, 2017.
Web links
- The Incredible Milk-Producing Male Bat , BATS Magazine, Volume 13, Issue 1, Spring 1995