Abanda Caves

Last updated

The Abanda Caves are a cave complex in Gabon, located in the upstream of Fernan Vaz Lagoon. They were first mentioned by Dr. Marco Marti and Claude Werotte in the early 2000s, [1] and fully explored during several caving expeditions by Oslisly, Testa, Sebag and Shirley. [2]

Keyhole-shaped underground passage in the Abanda caves, Gabon, with bats Abanda-cave-keyhole-gallery.jpg
Keyhole-shaped underground passage in the Abanda caves, Gabon, with bats

There are two independent cave networks: the Dinguembou cave (350m) and the Mugumbi cave (400m). Access to the horizontal passages is possible through vertical shafts of about 7m deep. They host large colonies of bats (Egyptian fruit bat, Sundevall's roundleaf bat, Giant roundleaf bat) estimated to more than 100,000 individuals. [2] Picathartes nests have been observed at the entrances of the caves.

The Caves of Abanda are known to host an endemic population of orange-colored cave-dwelling dwarf crocodiles. They were described by herpetologist Matthew H. Shirley after the first scientific expedition in the caves in 2010. These crocodiles live in complete darkness, they feed mostly on bats and cave crickets [3] and swim in liquid bat guano. [4]

Orange cave-dwelling dwarf crocodile next to a "normal" aboveground individual in Gabon Cave-dwelling-orange-crocodile.jpg
Orange cave-dwelling dwarf crocodile next to a "normal" aboveground individual in Gabon

Related Research Articles

<span class="mw-page-title-main">Lastoursville</span> Place in Ogooué-Lolo Province, Gabon

Lastoursville or Mandji is a city in east-central Gabon, lying on the Ogooué River, the Trans-Gabon Railway and the N3 road. It was founded as a slave depot named Mandji, renamed Maadiville in 1883 and finally took its current name for François Rigail de Lastours in 1886. It grew around palm oil production and as an administrative centre, and soon became a major missionary centre. The town is also known for its caves.

<span class="mw-page-title-main">Dwarf crocodile</span> Species of reptile

The dwarf crocodile, also known as the African dwarf crocodile, broad-snouted crocodile or bony crocodile, is an African crocodile that is also the smallest extant (living) species of crocodile.

<span class="mw-page-title-main">Indian roundleaf bat</span> Species of bat

The Indian roundleaf bat, also known as the large Ceylon leaf-nosed bat or Kelaart's leaf‐nosed bat is a species of bat in the family Hipposideridae. It is endemic to the Indian subcontinent, with marginal populations also detected in Southeast Asia. Its natural habitats are subtropical or tropical dry forests and caves. The bat has three subspecies that occur in India, Sri Lanka, and Myanmar. The Indian subspecies, H. l. indus, is smaller than the ones found in Sri Lanka and Myanmar, although there are no other characteristics that differentiate the subspecies.

<span class="mw-page-title-main">Aba roundleaf bat</span> Species of bat

The Aba roundleaf bat, also known as the Aba leaf-nosed bat is a species of bat in the family Hipposideridae. It is found in West Africa along the southern coast from Nigeria to Senegal. Populations have also been noted in Sudan and Uganda. Its natural habitats are subtropical or tropical moist lowland forests, dry and moist savannas, and caves.

<span class="mw-page-title-main">Great roundleaf bat</span> Species of bat

The great roundleaf bat, also known as the great Himalayan leaf-nosed bat is a species of bat in the family Hipposideridae found in South Asia, Southeast Asia, and China. It gives birth to two young a year. It has been assessed as least concern by the IUCN.

<span class="mw-page-title-main">Bicolored roundleaf bat</span> Species of bat

The bicolored roundleaf bat is a species of bat in the family Hipposideridae found in Indonesia, Malaysia, the Philippines, Thailand, and Timor-Leste. This bat inhabits caves, rock crevices and tunnels among lowland forests. They roost in large numbers and consume mostly small winged insects. Their navigation and hunting skills come from the use of echolocation. Its leafnose is used to release ultrasonic shouts to distinguish its surroundings. Echolocation is also used to distinguish other species based on their wingbeat and size. The habitat of this bat decides the color of its fur. Bleaching fumes of a cave environment will cause an orange colored fur. Those who inhabit a well-ventilated roost will be a light brown color.

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

Sundevall's roundleaf bat, also called Sundevall's leaf-nosed bat, is a species of bat in the family Hipposideridae.

<span class="mw-page-title-main">Kolar leaf-nosed bat</span> Endanged species of bat found in India

The Kolar leaf-nosed bat, or leafletted leaf-nosed bat is a species of bat in the family Hipposideridae. It is endemic to India. Its natural habitats are subtropical or tropical dry forests and caves. It is found in only one cave in India, and its population is less than 200 individuals.

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

The Andaman horseshoe bat is a species of bat in the family Rhinolophidae. It is endemic to the Andaman Islands. During the day, it roosts in caves, but may also choose tree hollows.

<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.

<span class="mw-page-title-main">Lamotte's roundleaf bat</span> Species of mammal

Lamotte's roundleaf bat is a species of bat found only at Mount Nimba on the border of Côte d'Ivoire, Guinea and Liberia. It is critically endangered.

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

The Hipposideridae are a family of bats commonly known as the Old World leaf-nosed bats. While it has often been seen as a subfamily, Hipposiderinae, of the family Rhinolophidae, it is now more generally classified as its own family. Nevertheless, it is most closely related to Rhinolophidae within the suborder Yinpterochiroptera.

<span class="mw-page-title-main">Deer Cave</span>

Deer Cave, located near Miri, Sarawak, Malaysia, is a show cave attraction of Gunung Mulu National Park. It was surveyed in 1961 by G. E. Wilford of the British Borneo Geological Survey, who predicted that Mulu would yield many more caves in the future. The cave, which is also known as Gua Payau or Gua Rusa by the local Penan and Berawan people, is said to have received its name because of the deer that go there to lick salt-bearing rocks and shelter themselves.

Kitum Cave is located in Mount Elgon National Park, Kenya. In the 1980s, two European visitors contracted Marburg virus disease there. It is one of five named “elephant caves” of Mount Elgon where animals, including elephants, “mine” the rock for its sodium-rich salts.

<span class="mw-page-title-main">Bat virome</span> Group of viruses associated with bats

The bat virome is the group of viruses associated with bats. Bats host a diverse array of viruses, including all seven types described by the Baltimore classification system: (I) double-stranded DNA viruses; (II) single-stranded DNA viruses; (III) double-stranded RNA viruses; (IV) positive-sense single-stranded RNA viruses; (V) negative-sense single-stranded RNA viruses; (VI) positive-sense single-stranded RNA viruses that replicate through a DNA intermediate; and (VII) double-stranded DNA viruses that replicate through a single-stranded RNA intermediate. The greatest share of bat-associated viruses identified as of 2020 are of type IV, in the family Coronaviridae.

<span class="mw-page-title-main">Bat as food</span> Bat eaten as food

Bats are eaten by people in parts of some Asian, African, Pacific Rim countries and cultures, including China, Vietnam, Seychelles, the Philippines, Indonesia, Palau, Thailand, and Guam. Half the megabat species are hunted for food but only eight percent of the insectivorous bat species are. In Guam, Mariana fruit bats are considered a delicacy.

<span class="mw-page-title-main">Yagodinska Cave</span>

Yagodinska Cave is a cave in the Rhodope Mountains, southern Bulgaria. It is included in the 100 Tourist Sites of Bulgaria under № 89. It is named after the homonymous village nearby. With a total length of 10,500 m, Yagodinska is the third longest cave in the country after Duhlata and Orlova Chuka and the longest in the Rhodopes. Yagodinska Cave is home to 11 species of bats.

<span class="mw-page-title-main">Olivier Testa</span> French speleologist, explorer and cave diver

Olivier Testa is a cave explorer, known for his discovery of the orange cave-dwelling crocodiles of Gabon, the Iroungou burial cave in Gabon, the discovery of unexpected caves in the volcanic Bamboutos mountains in Cameroon and several discoveries in Haiti. He has led or participated in over 40 caving expeditions in Africa, Asia and in the Caribbean.

References

  1. "Abanda expedition official website".
  2. 1 2 Testa, Olivier; Oslisly, Richard; Sebag, David; Shirley, Matthew; Decaëns, Thibaud (2011-12-01). "Crocodiles des cavernes !". Spelunca (124): 41–43.
  3. Shirley, Matthew; Burtner, Brittany; Oslisly, Richard; Sebag, David; Testa, Olivier (2016-09-26). "Diet and body condition of cave-dwelling dwarf crocodiles (Osteolaemus tetraspis , Cope 1861) in Gabon". African Journal of Ecology. doi:10.1111/aje.12365.
  4. "New Scientist : Weird orange crocodiles found gorging on bats in Gabon's caves, 2016".