Large flying fox

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"Greater flying fox" redirects here. For the species from New Guinea and nearby islands, see great flying fox.

Large flying fox
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Chiroptera
Family: Pteropodidae
Genus: Pteropus
Species:
P. vampyrus
Binomial name
Pteropus vampyrus
Large flying fox range
Synonyms
  • Vespertilio vampyrus Linnaeus, 1758
  • Pteropus giganteus (Brünnich, 1825)

The large flying fox (Pteropus vampyrus, formerly Pteropus giganteus), also known as the greater flying fox, Malayan flying fox, Malaysian flying fox, large fruit bat, kalang, or kalong, is a southeast Asian species of megabat in the family Pteropodidae.[3] Despite its scientific name, it feeds exclusively on fruits, nectar, and flowers, like the other flying foxes of the genus Pteropus. It is noted for being one of the largest bats.[4] As with nearly all other Old World fruit bats, it lacks the ability to echolocate but compensates for it with well-developed eyesight.[5]

Taxonomy

P. livingstonii

P. voeltzkowi

"vampyrus" group

P. dasymallus

P. pumilus

P. rodricensis

P. vampyrus

P. lylei

P. medius

P. aldabrensis

P. rufus

P. seychellensis
*

P. niger
*

P. seychellensis
*

P. niger
*

P. pselaphon

Location of the large flying fox (Pteropus vampyrus) relative to some other members of its genus[6]

The large flying fox was one of the many

frugivorous.[4]

Based on phylogenetic analysis using mitochondrial DNA, the closest relative of the large flying fox is the Rodrigues flying fox (Pteropus rodricensis).[6] Because the genus Pteropus is so speciose, it is further subdivided into species groups. The large flying fox is the namesake of the "vampyrus" group, which also includes the following species:[6]

Description

Main articles: Megabat § Description, and Pteropus § Description

The large flying fox is among the largest species of bat.

dental formula is 2.1.3.22.1.3.3. It has a total of 34 teeth.[11][13] The large flying fox's wings are short and somewhat rounded at the tips. This allows them to fly slowly, but with great maneuverability.[4]
The wing membranes are only haired near the body.

Biology and ecology

This species primarily feeds on flowers, nectar and fruit. When all three food items are available, flowers and nectar are preferred.

Moniliformis convolutus.[16]

Behavior and life history

Colonies of large flying foxes fly in a scattered stream.[11] They may fly up to 50 km (31 mi) to their feeding grounds in one night. Vocalizations are not made during flight.[11] Large flocks fuse into family or feeding groups upon arrival at feeding grounds.[4] Flying foxes may circle a fruit tree before landing, and usually land on the tips of branches in an upright position, then fall into a head-down position from which they feed.[4] Feeding aggregations tend to be very noisy.[17]

Flowering trees form the basis of territories in this species. Territorial behavior includes growling and the spreading of wings.[17] During antagonistic behavior, individuals maintain spacing with wrists/thumbs sparring, bites, and loud vocalizations.[12] When moving to a suitable resting place after landing, an individual may fight with conspecifics along the way.[12] A roosting flying fox is positioned upside down with its wings wrapped up.[18] When it gets too warm, a flying fox fans itself with its wings.[12] Roosting bats are restless until midmorning.

Female large flying fox gestations are at their highest between November and January in Peninsular Malaysia, but some births occur in other months.[19] In Thailand, gestation may take place during the same period with young being born in March or early April.[11][19] Females apparently give birth during April and May in the Philippines,[18] and usually give birth to only one young.[11] For the first days, the mothers carry their young, but leave them at the roost when they go on their foraging trips.[4] The young are weaned by two to three months.[11]

Range and habitat

The large flying fox ranges from Malay Peninsula, to the Philippines in the east and Indonesian Archipelago of Sumatra, Java, Borneo and Timor in the south.[20] In certain areas, the bat prefers coastal regions, but it can also be found at elevations up to 1,370 m (4,490 ft).[21]

Flying foxes inhabit

primary forest, mangrove forest, coconut groves, mixed fruit orchards, and a number of other habitats.[19] During the day, trees in mangrove forests and coconut groves may be used as roosts.[12] In Malaysia, flying foxes prefer lowland habitats below 365 m.[14] In Borneo, they inhabit the coastal areas, but move to nearby islands to feed on fruit.[8] Flying foxes roost in the thousands (maximum). One colony was recorded numbering around 2,000 individuals in a mangrove forest in Timor[12] and colonies of 10,000–⁠20,000 have also been reported.[4] In general, mangrove roosts have lower numbers of resting bats compared to lowland roost sites, which could mean mangrove forests are only used temporarily.[14]

Relationship to humans

The large flying fox is hunted for bushmeat. In Peninsular Malaysia, 1,756 hunting licenses were issued for the large flying fox from 2002–2006. In total, these hunting licenses permitted the hunting of 87,800 large flying foxes, or about 22,000 each year. Based on population modeling, the loss of the estimated 22,000 large flying foxes annually is unlikely to be sustainable. A 2009 study predicted extinction of the Peninsular Malaysian population within 6–81 years if 22,000 individuals are lost to hunting each year.[22]

The large flying fox is a

seropositive once more. Two other bats—from which the Nipah virus was never detected—also registered as seropositive at points within the year. This suggested that the Nipah virus can recrudesce in the large flying fox, or maintain itself after periods of remission. The virus also recrudesces in humans, with humans becoming fatally ill with the disease up to four years after first exposure.[24]

Conservation

As of 2022, the large flying fox is evaluated as an

habitat loss through deforestation.[1]
The large flying fox is on Appendix II of CITES, which restricts international trade.[25]

One threat to the large flying fox is habitat destruction.[19] Flying foxes are sometimes hunted for food, and the controls on hunting seem to be unenforceable.[4] In some areas, farmers consider them pests as they sometimes feed on their orchards.[14] This species is also hunted for bushmeat in Indonesia, contributing to its decline.[26]

References

  1. ^ a b Mildenstein, T.; Abdul Aziz, S.; Paguntalan, L.; Jakosalem, P.G.; Mohd-Azlan, J.; Tagtag, A.; Bansa, L.; Reintar, A.R.; Struebig, M.; Fredriksson, G.; Lee, B.; Thong, V.D.; Sheherazade. (2022). "Pteropus vampyrus". IUCN Red List of Threatened Species. 2022: e.T18766A22088824. Retrieved 9 December 2022.
  2. ^ a b Linnaeus, Carl (1758). Systema naturæ per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I (in Latin) (10th ed.). Holmiæ: Laurentius Salvius. p. 31. Retrieved 21 November 2012.
  3. OCLC 62265494
    .
  4. ^
    S2CID 31875754. Archived from the original
    (PDF) on 2015-02-21. Retrieved 2012-12-29.
  5. ^ Matti Airas. "Echolocation in bats" (PDF). HUT, Laboratory of Acoustics and Audio Signal Processing. p. 4. Archived from the original (PDF) on October 19, 2013. Retrieved July 19, 2013.
  6. ^
    PMID 24662680
    .
  7. ^ a b Andersen, Knud (1912). Catalogue of the Chiroptera in the collection of the British Museum. Vol. 1 (2nd ed.). London: British Museum (Natural History). Department of Zoology . [Mammals].
  8. ^
    ISBN 9679994716
  9. ISBN 978-0-691-13551-9
  10. ISBN 978-1-906780-71-5
    .
  11. ^ a b c d e f g h Lekagul B., J. A. McNeely. 1977. Mammals of Thailand. Association for the Conservation of Wildlife, Bangkok, Thailand.
  12. ^
    hdl:2246/1288
    .
  13. ^ "Pteropus vampyrus (large flying fox)". Animal Diversity Web.
  14. ^ a b c d Lim, B. L. (1966). "Abundance and distribution of Malaysian bats in different ecological habitats". Federated Museums Journal. 11: 61–76.
  15. ^ a b Davis D. D. (1962). "Mammals of the lowland rainforest of North Borneo". Bulletin of the National Museum of Singapore. 31: 1–129.
  16. PMID 27189420
    .
  17. ^
    JSTOR 2387904
    .
  18. ^ a b Rabor D. (1977). Philippine birds and mammals, University of Philippines Press.
  19. ^ a b c d Heideman P. D., L. D. Heaney. (1992). "Pteropus vampyrus". pp. 140-143 in Old World fruit bats: an action plan for the family Pteropodidae (S. P. Mickleburgh, A. M. Hutson, P. A. Racy, eds). ICUN Survival Commission, Gland, Switzerland.
  20. ISBN 0198546939
    .
  21. ^ Medway L. (1965). Wild mammals of Malaya (Peninsular Malaysia) and Singapore. Oxford University Press.
  22. doi:10.1111/j.1365-2664.2009.01699.x
    .
  23. ^ Constable, Harriet (2021-01-12). "The other virus that worries Asia". www.bbc.com. Retrieved 2022-01-02.
  24. PMID 21122240
    .
  25. ^ "Appendices I, II and III". CITES. 4 October 2017. Retrieved 28 August 2019.
  26. ^ Mickleburgh, S., Waylen, K., & Racey, P. (2009). Bats as bushmeat: a global review. Oryx, 43(02), 217-234.

External links

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