Straw-coloured fruit bat

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Straw-coloured fruit bat
Eidolon helvum fg01.JPG
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Chiroptera
Family: Pteropodidae
Genus: Eidolon
Species:
E. helvum
Binomial name
Eidolon helvum
Kerr, 1792
Straw-coloured Fruit Bat area.png
Straw-coloured fruit bat range

The straw-coloured fruit bat (Eidolon helvum) is a large fruit bat that is the most widely distributed of all the African megabats. It is quite common throughout its area ranging from the southwestern Arabian Peninsula, across forest and savanna zones of sub-Saharan Africa. It is listed as Near Threatened on the IUCN Red List due to a decreasing population trend. Straw-coloured fruit bats travel in massive colonies of at least 100,000 bats and sometimes massing up to 1 million. From October to end of December every year, in the largest migration of mammals on the planet, up to 10 million straw-coloured fruit bats congregate in Kasanka National Park, Zambia, roosting in a 2 hectare area of Mushitu forest each day. This migration was only discovered in 1980. [2] [3] Their necks and backs are a yellowish-brown colour, while their undersides are tawny olive or brownish.

Contents

Description

The straw-colored fruit bat was named based on its yellowish fur Bat Week 2017 - Congressional Reception (37237943654) (cropped).jpg
The straw-colored fruit bat was named based on its yellowish fur

The straw-coloured fruit bat is named for the silky yellowish or straw colour of its fur. The wings are black, and the back hair is pale and tawny. Males are generally bright orange and females are usually yellowish. The bats have large cheeks, eyes, and ears. The average weight of these bats ranges from 8 to 12 oz (230 to 340 g) and the animals grow to 5.7 to 9 in (14 to 23 cm) in length, with wings spanning up to 30 in (76 cm). Males are generally larger than females. The bat's heart is very large, and its wings are long and tapered at the tip. The cheeks of the bat are also large and pouch-like. [4]

Behaviour and ecology

The straw-coloured fruit bat is a highly social species. The bats tend to live in groups of over 100,000 and at times that number may increase to almost one million. At night the bats leave the roost in smaller groups to find food by sight and smell. They have also been seen chewing on soft wood for moisture. These bats can also pollinate flowers and disperse seeds through the forests. They are the main agents of seed dispersal for the increasingly rare and economically significant African teak tree Milicia excelsa . [5]

Although they feed at night, straw-coloured fruit bats are not necessarily nocturnal. During the day, they will be found resting and moving among the colony. Year to year, season to season, the bats will return to the same place where they found food the previous year or season.

The mating season of straw-coloured fruit bats is from April to June and is not synchronized among the bats. Implantation is delayed until October and is synchronized with all females implanting during this time. [6] The delay corresponds one of two dry periods in the home range of the bats. Birth occurs in February and March. [7]

Diet

The diets of straw-coloured fruit bats vary depending on whether or not they are living in captivity. Wild bats usually eat bark, flowers, leaves, nectar, and fruits. In captivity, they are fed various mixes, including apples, oranges, bananas, grapes, and cantaloupe. In some zoos, they are also fed a marmoset diet. [8]

Distribution and habitat

The straw-coloured fruit bat is the most widely distributed fruit bat in Africa, and perhaps the world. It appears mainly in Africa, mostly among the sub-Saharan climates, in many forest and savanna zones, and around the southwestern Arabian peninsula. It can also be found in urban areas and at altitudes up to 2,000 m (6,600 ft). It prefers tall trees for roosting.[ citation needed ]

Threats

The straw-coloured fruit bat is hunted as bushmeat in West and Central Africa. [9]

In 2011, it was estimated that about 128,400 straw-coloured fruit bats are traded as bushmeat every year in four cities in southern Ghana. [10]

Related Research Articles

<span class="mw-page-title-main">Megabat</span> Family of fruit bats

Megabats constitute the family Pteropodidae of the order Chiroptera (bats). They are also called fruit bats, Old World fruit bats, or—especially the genera Acerodon and Pteropus—flying foxes. They are the only member of the superfamily Pteropodoidea, which is one of two superfamilies in the suborder Yinpterochiroptera. Internal divisions of Pteropodidae have varied since subfamilies were first proposed in 1917. From three subfamilies in the 1917 classification, six are now recognized, along with various tribes. As of 2018, 197 species of megabat had been described.

<span class="mw-page-title-main">Kasanka National Park</span> National Park in Zambias Central Province

Kasanka National Park is a park located in the Chitambo District of Zambia’s Central Province. At roughly 390 km2 (150 sq mi), Kasanka is one of Zambia’s smallest national parks. Kasanka was the first of Zambia’s national parks to be managed by a private-public partnership. The privately funded Kasanka Trust Ltd has been in operation since 1986 and undertakes all management responsibilities, in partnership with the Department of National Parks and Wildlife. The park has an average elevation between 1,160 m (3,810 ft) and 1,290 m (4,230 ft) above mean sea level. It has a number permanent shallow lakes and water bodies with the largest being Wasa. There are five perennial rivers in the park, with the largest being the Luwombwa River. The Luwombwa is the only river that drains the NP, which flows out in the northwestern corner. It is a tributary of the Luapula, which further upstream also drains the Bangweulu Swamp and forms the main source of the Congo River. Although Kasanka NP is part of the Greater Bangweulu Ecosystem, there is no direct hydrological connection between the park and the Bangweulu Wetlands.

<span class="mw-page-title-main">Hammer-headed bat</span> Megabat widely distributed in West and Central Africa

The hammer-headed bat, also known as hammer-headed fruit bat, big-lipped bat, and hammerhead bat, is a megabat widely distributed in West and Central Africa. It is the only member of the genus Hypsignathus, which is part of the tribe Epomophorini along with four other genera. It is the largest bat in continental Africa, with wingspans approaching 1 m (3.3 ft), and males almost twice as heavy as females. Males and females also greatly differ in appearance, making it the most sexually dimorphic bat species in the world. These differences include several adaptations that help males produce and amplify vocalizations: the males' larynges are about three times as large as those of females, and they have large resonating chambers on their faces. Females appear more like a typical megabat, with foxlike faces.

<span class="mw-page-title-main">Livingstone's fruit bat</span> Species of bat

Livingstone's fruit bat, also called the Comoro flying fox, is a megabat in the genus Pteropus. It is an Old World fruit bat found only in the Anjouan and Mohéli islands in the Union of the Comoros in the western Indian Ocean.

<span class="mw-page-title-main">Nigerian free-tailed bat</span> Species of bat

The Nigerian free-tailed bat is a species of bat in the family Molossidae. It is native to two widely separated parts of Africa, and is sometimes considered to represent two separate species.

<span class="mw-page-title-main">Madagascan fruit bat</span> Species of bat

The Madagascan fruit bat is a species of bat in the family Pteropodidae. It is endemic to Madagascar and is listed as "Vulnerable" by the IUCN because it is hunted as bushmeat.

<span class="mw-page-title-main">Gambian epauletted fruit bat</span> Species of bat

The Gambian epauletted fruit bat is a species of megabat in the family Pteropodidae. It is found in Benin, Burkina Faso, Cameroon, Central African Republic, Chad, Democratic Republic of the Congo, Ivory Coast, Ethiopia, Gambia, Ghana, Guinea, Guinea-Bissau, Liberia, Mali, Niger, Nigeria, Senegal, Sierra Leone, South Sudan, Sudan, and Togo. Its natural habitats are subtropical or tropical dry forests and savanna.

<span class="mw-page-title-main">Wahlberg's epauletted fruit bat</span> Species of bat

Wahlberg's epauletted fruit bat is a species of megabat in the family Pteropodidae. It is commonly found across southern Africa.

<span class="mw-page-title-main">Harpy fruit bat</span> Species of bat

The harpy fruit bat is a species of megabat in the family Pteropodidae. It is endemic to the Philippines.

<span class="mw-page-title-main">Midas free-tailed bat</span> Species of bat

The Midas free-tailed bat is a species of bat scientifically classified in the order Chiroptera and the family Molossidae. It is distributed from western Africa to Saudi Arabia and further south. Its natural habitats are dry savanna, moist savanna, woodlands and hot deserts. The more southern are also known to live around large rivers or the swamps.

<span class="mw-page-title-main">Gray flying fox</span> Species of mammal

The gray flying fox is a species of flying fox in the family Pteropodidae. It is not to be confused with the Grey-headed flying fox. It is found in Indonesia, but not in the Philippines, despite occasional reference to such. Very little is known about this species. The gray flying fox has small size and neutral coloration with a brownish head and an orange abdomen. It probably roosts individually or in small groups. It was listed on appendix II of CITES, and is classified as "Data Deficient" by the IUCN. This species has been decimated by hunting for bushmeat in Indonesia. The hunters use fishing hooks, ropes, and other supplies to hunt the bats. The ropes and hooks are placed along their flight paths, tearing and ensnaring the bats' wings when are flying. In the course of a hunting season, entire colonies can be killed.

<span class="mw-page-title-main">Lyle's flying fox</span> Species of mammal

Lyle's flying fox is a species of flying fox in the family Pteropodidae. It is found in Cambodia, Thailand and Vietnam, with an outlying population in Yunnan, China. It faces persecution from farmers and it is killed for bushmeat in parts of its range. The International Union for Conservation of Nature has rated its conservation status as being "vulnerable".

<span class="mw-page-title-main">Great flying fox</span> Species of mammal

The great flying fox, also known as the greater flying fox or Bismarck flying fox, is a species of megabat in the genus Pteropus, found throughout lowland areas of New Guinea and in the Bismarck Archipelago. Conflicting evidence suggests that its closest relative is either the spectacled flying fox or, jointly, the Pelew and insular flying foxes. Two subspecies are recognized. At up to 1.6 kg (3.5 lb) in weight, it is among the heaviest bats in the world and the largest bat in Melanesia. It is a gregarious animal which roosts with hundreds or thousands of individuals. In part due to its wide variation in color, it has many taxonomic synonyms, including Pteropus degener, Pteropus papuanus, and Pteropus sepikensis. It may forage during the day or night in search of fruit, including figs or fruits from the family Sapotaceae. It is considered a least-concern species by the IUCN, though its numbers have been negatively impacted by what appeared to be a disease, as well as by hunting for bushmeat that occurs across its range.

<span class="mw-page-title-main">Madagascan flying fox</span> Species of bat

The Madagascan flying fox, Madagascar flying-fox, or Madagascar fruit bat is a species of megabat in the genus Pteropus. It is endemic to Madagascar. Its natural habitats are diverse, and include moist lowland forests, dry forests, succulent woodlands, and spiny thickets, and mangroves. It eats figs and other fruits, flowers, and leaves. It is threatened by habitat loss.

<span class="mw-page-title-main">Large flying fox</span> Species of fruit bat

The large flying fox, 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. 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. As with nearly all other Old World fruit bats, it lacks the ability to echolocate but compensates for it with well-developed eyesight.

<span class="mw-page-title-main">Pemba flying fox</span> Species of bat

The Pemba flying fox is a species of flying fox in the family Pteropodidae. It is endemic to the island of Pemba on the coast of Tanzania.

<span class="mw-page-title-main">Maclaud's horseshoe bat</span> Species of bat

Maclaud's horseshoe bat is a species of bat in the family Rhinolophidae. It is endemic to Guinea. Its natural habitats are moist savanna, caves and other subterranean habitats. It is one of five African microbat species to be listed as endangered by the IUCN. In 2013, Bat Conservation International listed this species as one of the 35 species of its worldwide priority list of conservation. It is threatened by habitat loss.

<i>Milicia excelsa</i> Species of tree

Milicia excelsa is a tree species from the genus Milicia of the family Moraceae. Distributed across tropical Central Africa, it is one of two species yielding timber commonly known as African teak, iroko, intule, kambala, moreira, mvule, odum and tule.

<span class="mw-page-title-main">Bougainville monkey-faced bat</span> Species of mammal

The Bougainville monkey-faced bat or Bougainville flying monkey is a megabat endemic to Bougainville Island of Papua New Guinea and Choiseul Island of the Solomon Islands in Melanesia. It inhabits mature forests in upland areas, within the Autonomous Region of Bougainville and Bougouriba Province.

<span class="mw-page-title-main">Lubee Bat Conservancy</span> Non-profit organization in Florida, U.S.

Lubee Bat Conservancy is a nonprofit organization in Gainesville, Florida. The organization was founded in 1989 by Luis F. Bacardi as a center for the research, conservation, and breeding of endangered animals; it later narrowed its focus solely to bats, particularly megabats.

References

  1. Cooper-Bohannon, R.; Mickleburgh, S.; Hutson, A.M.; Bergmans, W.; Fahr, J.; Racey, P.A. (2020). "Eidolon helvum". IUCN Red List of Threatened Species . 2020: e.T7084A22028026. doi: 10.2305/IUCN.UK.2020-2.RLTS.T7084A22028026.en . Retrieved 17 November 2021.
  2. Beamer, B. "How to Catch a Bat". National Geographic. Retrieved 8 March 2019.
  3. Pumfrett, Belinda (7 November 2018). Bats About Kasanka. ARC Zambia. ISBN   978-9982-70-630-8 . Retrieved 8 March 2019.
  4. Akron Zoo Information on Straw Colored Bats
  5. Taylor, D. A. R. et al. The role of the fruit bat, Eidolon helvum, in seed dispersal, survival, and germination in Milicia excelsa, a threatened West African hardwood. Northern Arizona University School of Forestry.
  6. Kingdon, Jonathan . (1974). East African mammals. Volume 2A: Insectivores and bats. London: Academic Press. pp. 146–152. ISBN   9780124083028.
  7. Fayenuwo, J. O.; Halstead, L. B. (22 May 1974). "Breeding Cycle of Straw-Colored Fruit Bat, Eidolon helvum, at Ile-Ife, Nigeria". Journal of Mammalogy. 55 (2): 453–454. doi:10.2307/1379016. JSTOR   1379016.
  8. Oregon Zoo Information on Straw Colored Bats
  9. Mickleburgh, S.; Waylen, K.; Racey, P. (2009). "Bats as bushmeat: a global review" (PDF). Oryx. 43 (2): 217–234. doi: 10.1017/S0030605308000938 .
  10. Kamins, A. O.; Restif, O.; Ntiamoa-Baidu, Y.; Suu-Ire, R.; Hayman, D. T.; Cunningham, A. A.; Wood, J. L. & Rowcliffe, J. M. (2011). "Uncovering the fruit bat bushmeat commodity chain and the true extent of fruit bat hunting in Ghana, West Africa". Biological Conservation. 144 (12): 3000–3008. doi:10.1016/j.biocon.2011.09.003. PMC   3323830 . PMID   22514356.