The cave nectar bat, dawn bat, common dawn bat, common nectar bat or lesser dawn bat (''Eonycteris spelaea'')
is a species of
megabat
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 su ...
within the genus ''
Eonycteris''. The scientific name of the species was first published by
Dobson in 1871.
Description
The upper parts of the cave nectar bat are grey-brown to dark brown to black. The underparts are paler and the neck is sometimes yellowish brown. The muzzle of this bat is elongated, and particularly adapted for drinking
nectar
Nectar is a sugar-rich liquid produced by plants in glands called nectaries or nectarines, either within the flowers with which it attracts pollinating animals, or by extrafloral nectaries, which provide a nutrient source to animal mutualists ...
. The species has as well an external tail. The head and body length measures , the tail length is about and the forearm length measures
Habits and habitat
The cave nectar bat is found in
primary forests and in disturbed and agricultural areas. It roosts in caves, in larger groups, with some roosts exceeding 50,000 individuals, and it sometimes roosts with other bat species. In some places, this species seems to have adapted well to leafy, semi-urban habitats. Due to its large roosting size it has an IUCN status of "least concerned" however, only limited data is available on population size and trends. ''E. spelaea'' travels many kilometres each night in search of the nectar of flowering trees and shrubs. Because of that, this bat species is a very important pollinator of fruit trees, such as
durian
The durian (, ) is the edible fruit of several tree species belonging to the genus ''Durio''. There are 30 recognised ''Durio'' species, at least nine of which produce edible fruit. ''Durio zibethinus'', native to Borneo and Sumatra, is the onl ...
s,
notably ''
Durio zibethinus
''Durio zibethinus'' is the most common tree species in the genus ''Durio'' that are known as durian and have edible fruit also known as durian.
As with most other durian species, the edible flesh emits a distinctive odour that is strong and pen ...
'' and ''
Durio graveolens
''Durio graveolens,'' sometimes called the red-fleshed durian, orange-fleshed durian, or yellow durian, is a species of tree in the family Malvaceae. It is one of six species of durian named by Italian naturalist Odoardo Beccari. The specific ...
''.
It also feeds on and pollinates other commercially important crops such as banana (''
Musa
Musa may refer to:
Places
* Mūša, a river in Lithuania and Latvia
* Musa, Azerbaijan, a village in Yardymli Rayon
* Musa, Iran, a village in Ilam Province
* Musa, Chaharmahal and Bakhtiari, Iran
*Musa, Kerman, Iran
* Musa, Bukan, West Azerbaija ...
spp''.) and
jackfruit
The jackfruit (''Artocarpus heterophyllus''), also known as jack tree, is a species of tree in the fig, mulberry, and breadfruit family (Moraceae). Its origin is in the region between the Western Ghats of southern India, all of Bangladesh, ...
(''Artocarpus heterophyllus''). In addition to pollinating these plants, the cave nectar bat is an important pollinator for major crops, including up to 55 species of plants. Their tendencies to pollinate certain plants is determined by the proximity of their living quarters. There are at least thirteen plant taxa that the cave nectar bat feeds upon. The dependence on the proximity of the plants explain the variation of which plants that the cave nectar bats pollinate and feed upon. For this reason, ''E. spelaea'' is seen as an important species for pollination in disturbed areas bordering on urban and agricultural farms.
Distribution
''E. spelaea'' lives in
Bangladesh
Bangladesh (}, ), officially the People's Republic of Bangladesh, is a country in South Asia. It is the eighth-most populous country in the world, with a population exceeding 165 million people in an area of . Bangladesh is among the mos ...
,
Brunei
Brunei ( , ), formally Brunei Darussalam ( ms, Negara Brunei Darussalam, Jawi alphabet, Jawi: , ), is a country located on the north coast of the island of Borneo in Southeast Asia. Apart from its South China Sea coast, it is completely sur ...
,
Cambodia
Cambodia (; also Kampuchea ; km, កម្ពុជា, UNGEGN: ), officially the Kingdom of Cambodia, is a country located in the southern portion of the Indochinese Peninsula in Southeast Asia, spanning an area of , bordered by Thailand t ...
,
Indonesia
Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
(
Java
Java (; id, Jawa, ; jv, ꦗꦮ; su, ) is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea to the north. With a population of 151.6 million people, Java is the world's List ...
,
Kalimantan
Kalimantan () is the Indonesian portion of the island of Borneo. It constitutes 73% of the island's area. The non-Indonesian parts of Borneo are Brunei and East Malaysia. In Indonesia, "Kalimantan" refers to the whole island of Borneo.
In 2019, ...
,
Sumatra
Sumatra is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the sixth-largest island in the world at 473,481 km2 (182,812 mi.2), not including adjacent i ...
,
Sulawesi
Sulawesi (), also known as Celebes (), is an island in Indonesia. One of the four Greater Sunda Islands, and the world's eleventh-largest island, it is situated east of Borneo, west of the Maluku Islands, and south of Mindanao and the Sulu Ar ...
and some other small islands),
Laos
Laos (, ''Lāo'' )), officially the Lao People's Democratic Republic ( Lao: ສາທາລະນະລັດ ປະຊາທິປະໄຕ ປະຊາຊົນລາວ, French: République démocratique populaire lao), is a socialist ...
,
Malaysia
Malaysia ( ; ) is a country in Southeast Asia. The federation, federal constitutional monarchy consists of States and federal territories of Malaysia, thirteen states and three federal territories, separated by the South China Sea into two r ...
,
Myanmar
Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John C. Wells, Joh ...
,
Philippines
The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no),
* bik, Republika kan Filipinas
* ceb, Republika sa Pilipinas
* cbk, República de Filipinas
* hil, Republ ...
,
Singapore
Singapore (), officially the Republic of Singapore, is a sovereign island country and city-state in maritime Southeast Asia. It lies about one degree of latitude () north of the equator, off the southern tip of the Malay Peninsula, borde ...
,
Thailand
Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is bo ...
,
Vietnam
Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i ...
,
China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...
,
India
India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...
and
Timor-Leste
East Timor (), also known as Timor-Leste (), officially the Democratic Republic of Timor-Leste, is an island country in Southeast Asia. It comprises the eastern half of the island of Timor, the exclave of Oecusse on the island's north-weste ...
.
It had been previously recorded from
Gomantong Caves,
Sukau,
Segama, and
Madai
Madai (, ; el, Μηδος, ) is a son of Japheth and one of the 16 grandsons of Noah in the ''Book of Genesis'' of the Hebrew Bible.
Associated nations
Medes and related Iranian nations
Biblical scholars have generally identified Madai wit ...
in
Sabah
Sabah () is a States and federal territories of Malaysia, state of Malaysia located in northern Borneo, in the region of East Malaysia. Sabah borders the Malaysian state of Sarawak to the southwest and the North Kalimantan province of Indone ...
;
Niah,
Sungai Tinjar, and
Kuching
Kuching (), officially the City of Kuching, is the capital and the most populous city in the States and federal territories of Malaysia, state of Sarawak in Malaysia. It is also the capital of Kuching Division. The city is on the Sarawak River ...
in
Sarawak
Sarawak (; ) is a States and federal territories of Malaysia, state of Malaysia. The largest among the 13 states, with an area almost equal to that of Peninsular Malaysia, Sarawak is located in northwest Borneo Island, and is bordered by the M ...
; and
Sungai Tengah and
Kutai
Kutai is a historical region in what is now known as East Kalimantan, Indonesia on the island of Borneo and is also the name of the native ethnic group of the region (known as ''Urang Kutai'' or "the Kutai people"), numbering around 300,000 who ...
in
Kalimantan
Kalimantan () is the Indonesian portion of the island of Borneo. It constitutes 73% of the island's area. The non-Indonesian parts of Borneo are Brunei and East Malaysia. In Indonesia, "Kalimantan" refers to the whole island of Borneo.
In 2019, ...
.
Conservation
This species is killed for
bushmeat
Bushmeat is meat from wildlife species that are hunted for human consumption, most often referring to the meat of game in Africa. Bushmeat represents
a primary source of animal protein and a cash-earning commodity for inhabitants of humid tropi ...
in
Cambodia
Cambodia (; also Kampuchea ; km, កម្ពុជា, UNGEGN: ), officially the Kingdom of Cambodia, is a country located in the southern portion of the Indochinese Peninsula in Southeast Asia, spanning an area of , bordered by Thailand t ...
, Myanmar and the Philippines.
Research
The
genome
In the fields of molecular biology and genetics, a genome is all the genetic information of an organism. It consists of nucleotide sequences of DNA (or RNA in RNA viruses). The nuclear genome includes protein-coding genes and non-coding ge ...
of ''Eonycteris spelaea'' was recently sequenced using
PacBio
Pacific Biosciences of California, Inc. (aka PacBio) is an American biotechnology company founded in 2004 that develops and manufactures systems for gene sequencing and some novel real time biological observation. PacBio describes its platform ...
long-read sequencing. As a small,
frugivorous
A frugivore is an animal that thrives mostly on raw fruits or succulent fruit-like produce of plants such as roots, shoots, nuts and seeds. Approximately 20% of mammalian herbivores eat fruit. Frugivores are highly dependent on the abundance and ...
, specialist nectar-feeding
bat
Bats are mammals of the order Chiroptera.''cheir'', "hand" and πτερόν''pteron'', "wing". With their forelimbs adapted as wings, they are the only mammals capable of true and sustained flight. Bats are more agile in flight than most ...
with good flight potential and that can breed 1-2 times a year, it is an ideal species as an animal model for bats. Recent evidence has shown this species can carry multiple viruses such as
filoviruses
''Filoviridae'' () is a family of single-stranded negative-sense RNA viruses in the order ''Mononegavirales''. Two members of the family that are commonly known are Ebola virus and Marburg virus. Both viruses, and some of their lesser known re ...
,
coronavirus
Coronaviruses are a group of related RNA viruses that cause diseases in mammals and birds. In humans and birds, they cause respiratory tract infections that can range from mild to lethal. Mild illnesses in humans include some cases of the com ...
es,
astrovirus
Astroviruses are a type of virus that was first discovered in 1975 using electron microscopes following an outbreak of diarrhea in humans. In addition to humans, astroviruses have now been isolated from numerous mammalian animal species (and a ...
,
picornavirus
Picornaviruses are a group of related nonenveloped RNA viruses which infect vertebrates including fish, mammals, and birds. They are viruses that represent a large family of small, positive-sense, single-stranded RNA viruses with a 30 nm ...
,
lyssavirus
''Lyssavirus'' (from the Greek ''lyssa'' "rage, fury, rabies" and the Latin '' vīrus'') is a genus of RNA viruses in the family ''Rhabdoviridae'', order ''Mononegavirales''. Mammals, including humans, can serve as natural hosts. The genus ' ...
, pteropine
orthoreovirus
''Orthoreovirus'' is a genus of viruses, in the family ''Reoviridae'', in the subfamily '' Spinareovirinae''. Vertebrates serve as natural hosts. There are ten species in this genus. Diseases associated with this genus include mild upper respirat ...
and
flavivirus
''Flavivirus'' is a genus of positive-strand RNA viruses in the family ''Flaviviridae''. The genus includes the West Nile virus, dengue virus, tick-borne encephalitis virus, yellow fever virus, Zika virus and several other viruses which may cau ...
,
all without obvious signs of disease.
References
{{DEFAULTSORT:Cave nectar bat
Cave nectar
Cave nectar
Cave nectar
Cave nectar
Mammals of Borneo
Mammals of Brunei
Mammals of Myanmar
Mammals of India
Mammals of Cambodia
Mammals of China
Mammals of Laos
Mammals of the Philippines
Mammals of Singapore
Mammals of Vietnam
Mammals of Thailand
Cave nectar bat
The cave nectar bat, dawn bat, common dawn bat, common nectar bat or lesser dawn bat (''Eonycteris spelaea'') is a species of megabat within the genus '' Eonycteris''. The scientific name of the species was first published by Dobson in 1871.
De ...
Cave nectar bat
The cave nectar bat, dawn bat, common dawn bat, common nectar bat or lesser dawn bat (''Eonycteris spelaea'') is a species of megabat within the genus '' Eonycteris''. The scientific name of the species was first published by Dobson in 1871.
De ...
Cave nectar bat
The cave nectar bat, dawn bat, common dawn bat, common nectar bat or lesser dawn bat (''Eonycteris spelaea'') is a species of megabat within the genus '' Eonycteris''. The scientific name of the species was first published by Dobson in 1871.
De ...
Least concern biota of Asia
Cave nectar bat
The cave nectar bat, dawn bat, common dawn bat, common nectar bat or lesser dawn bat (''Eonycteris spelaea'') is a species of megabat within the genus '' Eonycteris''. The scientific name of the species was first published by Dobson in 1871.
De ...
Bats as food
Bats of India