Dulit frogmouth | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Clade: | Strisores |
Order: | Podargiformes |
Family: | Podargidae |
Genus: | Batrachostomus |
Species: | B. harterti |
Binomial name | |
Batrachostomus harterti Sharpe, 1892 | |
The Dulit frogmouth (Batrachostomus harterti) is a little-known species of bird in the frogmouth family, Podargidae, with a patchily recorded distribution in the mountain forests of northern and central Borneo to which it is endemic. [2] The species is monotypic.
The type specimen was collected by Charles Hose in 1891 on Mount Dulit in northern Sarawak, at an elevation of about 600 m, with the bird being taken "in a small jungle hut into which it had flown in the dusk evidently attracted by the light". [3] [4] The common name reflects the type locality, while the specific epithet honours German ornithologist Ernst Hartert.
It is a large, dark, chestnut-brown frogmouth, ranging in length from 32 to 37 cm. The wing length is 220 to 250 mm. It has buffish barring on the crown and a narrow buffish collar on the hindneck. The wing-coverts have large white spots. The underparts are paler brown with buff bars and spots. The sexes are similar. [3] [5]
The only other frogmouth of comparable size in Borneo is the large frogmouth (B. auritus), with which the Dulit frogmouth forms a superspecies. [6] The large frogmouth is slightly larger (with a length of 39 – 42 cm) and paler; the crown is spotted and vermiculated rather than barred, the wing-coverts more heavily spotted, and the underparts plainer. No other frogmouth found in Borneo is more than 30 cm in length. [5]
The call is not known for certain, though Tom Harrisson recorded a call in the Kelabit Highlands, which he attributed to this species, as "tuab tuab". The Kelabit name for the frogmouth is Tu’ub or Suit tu’ub. [3]
The frogmouth is endemic to Borneo. Only eight museum specimens are known, taken from Mount Dulit, the Usun Apau Plateau and the Kelabit Highlands in Sarawak, and from Mount Liang Kubung in West Kalimantan. It has also been seen near Poring in the Kinabalu National Park in Sabah. [3] [5]
Its preferred habitat is lower montane forest of both primary and secondary growth, at an elevation of 300 to 1500 m above sea level. [5] At Mount Dulit it replaces the more widespread large frogmouth altitudinally, the latter being found at lower levels. [6]
Very little is known of this frogmouth's breeding or feeding habits. A female specimen taken on 19 November was ready to lay eggs. [3] The stomach of a specimen taken in the Kelabit Highlands was full of locusts or grasshoppers. [3]
The range of the Dulit frogmouth is estimated at 127,000 km2 and decreasing. It is restricted to the Bornean Mountains Endemic Bird Area and is threatened by habitat loss through logging and agricultural development. Its conservation status is considered by BirdLife International to be Least Concern. [1] Proposed conservation measures include the investigation of the species’ ecology and the protection of suitable habitat. [7]
The frogmouths (Podargidae) are a group of nocturnal birds related to owlet-nightjars, swifts, and hummingbirds. Species in the group are distributed in the Indomalayan and Australasian realms.
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Hose's palm civet, also known as Hose's civet, is a viverrid species endemic to the island of Borneo. It is listed on the IUCN Red List as Vulnerable because of an ongoing population decline, estimated to be more than 30% over the last three generations and suspected to be more than 30% in the next three generations due to declines in population inferred from habitat destruction and degradation.
Nepenthes hurrelliana is a tropical pitcher plant endemic to Borneo, where it has been recorded from northern Sarawak, southwestern Sabah, and Brunei. It is of putative hybrid origin; its two original parent species are thought to be N. fusca and N. veitchii. A thick indumentum of rusty-brown hairs covers the entire plant, a characteristic presumably inherited from the latter.
Nepenthes murudensis, or the Murud pitcher-plant, is a tropical pitcher plant endemic to Mount Murud in Borneo, after which it is named. It is of putative hybrid origin: its two original parent species are thought to be N. reinwardtiana and N. tentaculata.
The Philippine frogmouth is a nocturnal bird that can be found throughout the Philippine archipelago. It is common in lowland forests and maturing second growth. There is little information about the bird. It feeds on grasshoppers, cicadas, crickets and beetles.
Bates's nightjar or the forest nightjar, is a bird species of the family Caprimulgidae, found in the rainforests of western Sub-Saharan Africa.
Blyth's frogmouth is a species of bird in the family Podargidae. It was previously considered to be conspecific with the Javan frogmouth and Palawan frogmouth. The bird is a tropical species that ranges from India to Australia.
The large frogmouth is a species of bird in the family Podargidae. It is found in Brunei, Indonesia, Malaysia, and Thailand, in subtropical or tropical moist lowland forest. Logging of its habitat poses a risk to its survival, and the International Union for Conservation of Nature has listed it as a vulnerable species.
Hodgson's frogmouth is a species of bird in the family Podargidae. It is found in Bangladesh, Bhutan, China, India, Laos, Myanmar, Thailand, and Vietnam. Its natural habitat is temperate forests.
The Javan frogmouth, sometimes known as Horsfield's frogmouth, is a species of bird in the family Podargidae. It is sometimes considered conspecific with the Blyth's and Palawan frogmouths. Found in Southeast Asia, Indonesia and the Philippines, it lives in subtropical or tropical moist lowland forest.
The Bornean frogmouth is bird species in the family Podargidae. Some taxonomists consider it to be a subspecies of the short-tailed frogmouth, but others consider it to be a distinct species. It is found in Indonesia and Malaysia and is endemic to the island of Borneo. Its natural habitats are subtropical or tropical moist lowland forest and subtropical or tropical moist montane forest. It is threatened by habitat loss.
The mountain blackeye, sometimes referred to as the olive blackeye or simply black-eye, is a species of passerine bird in the family Zosteropidae. It is endemic to the highest mountains on the island of Borneo. It is known from both Malaysian states on the island, and four of the five Indonesian provinces, but has never been recorded in Brunei. Typically found at elevations above 1,800 m (5,900 ft), the mountain blackeye sometimes moves to lower altitudes during periods of drought. There are four subspecies, which show clinal variations in size and coloring. Birds in the north are largest, darkest, and proportionately longer-tailed, while those further south are smaller, paler, and proportionately shorter-tailed. Adults are dark olive-green with a sharply-pointed, bright yellow-orange bill and a small dark mask connecting black lores with a black eye-ring. The subspecies show varying amounts of yellow in their plumage, particularly on the face and underparts. Young birds resemble their parents, but have less brightly colored bills.
The black oriole is a species of bird in the family Oriolidae. It is endemic to the island of Borneo. One of the least known of the orioles, its distribution range is restricted to Sarawak in Borneo. Along with the black-and-crimson, maroon, and silver orioles, it belongs to a clade of red and black orioles. The binomial name is after Charles Hose who collected the first specimen of the species on Mount Dulit.
The Bornean smooth-tailed treeshrew is a species of treeshrew in the family Tupaiidae. It is endemic to Borneo. Its natural habitat is subtropical or tropical dry forests. It is threatened by habitat loss.
The Borneo black-banded squirrel is a species of rodent in the family Sciuridae. It is endemic to northern Borneo.
Mount Dulit is a mountain in Borneo. It peaks at 1,311 metres (4,301 ft) above sea level and stands at the head of the Baram River in northern Sarawak, Malaysia. It is a western outlier of the Bornean cordillera and is largely covered with montane tropical rainforest. It has given its name to various plants and animals including the Dulit frogmouth, Dulit partridge, the frog Rhacophorus dulitensis, the caecilian Ichthyophis dulitensis, the trilobite beetle genus Duliticola and the Vatica dulitensis tree. It is the site from which Charles Hose collected the holotype specimen of the rare and elusive Hose's palm civet in 1891.
The Dulit partridge, also known as Hose's partridge, has been considered a distinctive subspecies of the long-billed partridge, a bird in the Phasianidae, or pheasant, family. It is endemic to Borneo, where it appears to be separated altitudinally from the nominate subspecies, and is often considered now to be a full species, Rhizothera dulitensis. It is little-known, rare, and has not been recorded since 1937.
The Bornean black magpie, also known as the black crested magpie, is a treepie in the family Corvidae. It is endemic to the Southeast Asian island of Borneo.
Usun Apau National Park is a national park in Sarawak, Malaysia, on the island of Borneo. It was designated in 2005. It covers the Usun Apau Plateau in the highlands of central Borneo.