| Gomantong Caves | |
|---|---|
 Entrance to one of the caves. | |
| Coordinates | 5°31′0″N118°4′0″E / 5.51667°N 118.06667°E |
| Discovery | 1930 |
| Entrances | 2 |
The Gomantong Caves are an intricate cave system inside Gomantong Hill in Sandakan Division, Sabah, Malaysia. The hill is the largest limestone outcrop in the Lower Kinabatangan area.
Situated in the Gomantong Forest Reserve, the caves and the surrounding area are a protected area for wildlife, especially orangutans. The limestone hill is also the only known site for the endangered land snail Plectostoma mirabile . [1] Investigation of the guano deposits were first made in 1889 by J.H. Allard of the China Borneo Company, and the caves were first mapped by P. Orolfo in 1930. Detailed re-mapping and laser scanning of the caves was conducted in 2012 [2] and July 2014. [3]
The bat population is dominated by a colony of the wrinkle-lipped free-tailed bat (Chaerephon plicatus), whose nightly exodus is a popular tourist attraction. The population size, which has been widely exaggerated in the past, was counted at between 275,000 and 276,000 in 2012. [4] There are also bat hawks that linger not far from the scene and prey specifically on the bats as they leave their roost.
For centuries, the caves have been renowned for their valuable edible swiftlet nests, which are harvested for bird's nest soup. [5] The most valuable of the nests, the white ones, can sell for very high prices. The birds' nest collection is an ancient tradition, and the trading of these nests has been done since at least AD 500. Twice a year, from February to April and July to September, locals with licenses climb to the roof of the caves, using only rattan ladders, ropes, and bamboo poles, and collect the nests. The first collection takes place early in the breeding season before the swiftlets lay their eggs. The birds then make another nest in which they finally lay their eggs. After the young have fledged, the second collection is made. Care must be taken to assure that the nests are collected only after the young swiftlets have abandoned these nests. These individuals are very much in demand by the people and communities that hold the government's harvesting licenses. Edible birds' nests are protected under the Wildlife Conservation Enactment of 1997. Heavy fines and penalties are imposed on unlicensed collectors. [6]
The main cave system is divided into two parts: the more accessible Simud Hitam (Black Cave), and the larger Simud Putih (White Cave) which lies above. The names refer to the main type of nests produced by swiftlets in each cave. The cave system is home to many other animals, including massive populations of cockroaches, centipedes and bats. Outside one can see many raptors including crested serpent eagles, [7] kingfishers, and Asian fairy-bluebirds. Access is in the form of a wooden walkway circuiting the interior.
Simud Hitam ("Black Cave") is the more accessible of the two caves, only a few minutes' walk from the entrance building, and it is open to the general public. Its ceiling can reach 40–60 m (130–200 ft) high. It is the source of the less-valuable "black saliva" nests. These contain both feathers and saliva and require cleaning afterwards.
Simud Putih ("White Cave") is the larger of the two caves, and also the more technical; it is not open to the general public, and access requires appropriate caving equipment and experience. It is where the more valuable "white saliva" nests of the swiftlets are found, and is reached by a steep, 30-minute climb further up the mountains. The main entrance is located above and adjacent to the main "lighthole" at the back of Simud Hitam.
The swifts are a family, Apodidae, of highly aerial birds. They are superficially similar to swallows, but are not closely related to any passerine species. Swifts are placed in the order Apodiformes with hummingbirds. The treeswifts are closely related to the true swifts, but form a separate family, the Hemiprocnidae.
Swiftlets are birds from the four genera Aerodramus, Collocalia, Hydrochous and Schoutedenapus, which form the tribe Collocaliini within the swift family Apodidae. The group contains around thirty species mostly confined to southern Asia, south Pacific islands, and northeastern Australia, all within the tropical and subtropical regions. They are in many respects typical members of the Apodidae, having narrow wings for fast flight, with a wide gape and small reduced beak surrounded by bristles for catching insects in flight. What distinguishes many but not all species from other swifts and indeed almost all other birds is their ability to use a simple but effective form of echolocation to navigate in total darkness through the chasms and shafts of the caves where they roost at night and breed.
Aerodramus is a genus of small, dark, cave-nesting birds in the Collocaliini tribe of the swift family. Its members are confined to tropical and subtropical regions in southern Asia, Oceania and northeastern Australia. Many of its members were formerly classified in Collocalia, but were first placed in a separate genus by American ornithologist Harry Church Oberholser in 1906.
Madai Cave is a cave located in Kunak, Sabah, Malaysia. It is an integral part of the limestone hills range located within the Baturong Madai Forest Reserve.
Browne's Folly, or Brown's Folly, is a folly tower sitting within a 39.9 hectare biological and geological Site of Special Scientific Interest (SSSI) near the English village of Bathford in Somerset, notified in 1974: the site itself is known as the Farleigh Down Stone Quarry and is managed as a nature reserve by the Avon Wildlife Trust (AWT). The tower was built in 1848 and is a Grade II listed building.
The edible-nest swiftlet, also known as the white-nest swiftlet, is a small bird of the swift family which is found in Southeast Asia. Its opaque and whitish bird nest is made exclusively of solidified saliva and is the main ingredient of bird's nest soup, a delicacy of Chinese cuisine.
Germain's swiftlet is a species of swift.
The mountain swiftlet is a species of swift in the family Apodidae. It is endemic to the island of New Guinea and the nearby islands of Karkar, Yapen and Goodenough. It was once placed in the genus Collocalia but has been moved, with many others, to Aerodramus. The species is divided into three subspecies, with the nominate, A. h. hirundinacea ranging over most of New Guinea, the subspecies A. h. excelsus occurring over 1600 m in the Snow Mountains and Cartenz peaks of Irian Jaya and A. h. baru being restricted to Yapen Island. It occurs in alpine areas from 500 m to the treeline. Its natural habitat is tropical moist montane forests and other mountainous habitats in New Guinea. It also occurs in lower numbers in the lowlands near hills.
The Tahiti swiftlet or Polynesian swiftlet is a species of swift in the family Apodidae. While often compared to the Marquesan Swiftlet, this bird is often more pale faced. The subspecies is the Monotypic which means it does not include a subspecies.
The cave swiftlet or linchi swiftlet is a species of swift in the family Apodidae. It is found on the Indonesia islands of Sumatra, Java and Bali. It is a woodland species and nests in caves. The Bornean swiftlet was considered a subspecies, but is now usually considered distinct.
The giant swiftlet, also known as the waterfall swift, is a species of bird in the swift family, Apodidae. It is the only member of the monotypic genus Hydrochous. It is found in Malaysia, Sumatra and Java, where its natural habitats are subtropical or tropical moist montane forests and rivers. It is threatened by habitat loss.
The wrinkle-lipped free-tailed bat is a species of bat in the family Molossidae. It is found in Bangladesh, Bhutan, Cambodia, China, Cocos (Keeling) Islands, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, the Philippines, Sri Lanka, Thailand and Vietnam.
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.
The cave nectar bat, dawn bat, common dawn bat, common nectar bat or lesser dawn bat is a species of megabat within the genus Eonycteris. The scientific name of the species was first published by Dobson in 1871.
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.
The Mantanani Islands form a small group of three islands off the north-west coast of the state of Sabah, Malaysia, opposite the town of Kota Belud, in northern Borneo. The largest island is Mantanani Besar; the other two are Mantanani Kecil and Lungisan. It is a popular site for recreational diving and is known for its dugongs.
Edible bird's nests, also known as swallow nests, are bird nests created from solidified saliva by edible-nest swiftlets, Indian swiftlets and other swiftlets of the genera Aerodramus, Hydrochous, Schoutedenapus and Collocalia, which are harvested for human consumption.
The Kinabatangan District is an administrative district in the Malaysian state of Sabah, part of the Sandakan Division which includes the districts of Beluran, Kinabatangan, Sandakan, Telupid and Tongod. The capital of the district is in Kinabatangan Town.
The Bornean woolly horseshoe bat or Proconsul's horseshoe bat is an endangered species of horseshoe bat found on Borneo. Though it was discovered in 1959, it was not recognized as a distinct species until 2013.
A busyador or a swift nest collector is a person who harvests edible bird's nests in Southeast Asia, and particularly in the Philippines. The nests are made of the birds' solidified saliva, and serve as the main ingredient of bird's nest soup, a delicacy of Chinese cuisine.
