Eastern tree hyrax [1] | |
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Scientific classification | |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Hyracoidea |
Family: | Procaviidae |
Genus: | Dendrohyrax |
Species: | D. validus |
Binomial name | |
Dendrohyrax validus (True, 1890) [3] | |
Eastern tree hyrax range |
The eastern tree hyrax (Dendrohyrax validus) is a species of mammal within the family Procaviidae. The eastern tree hyrax is the most localized of the tree hyrax species, distributed patchily in a narrow band of lowland and montane forests in Kenya and Tanzania and adjacent islands. [1]
The eastern tree hyrax is a small, rotund guinea pig-like mammal with dense, soft fur and blunt, nailed toes. They weigh on average 2.75 kilograms or 6.1 pounds and have a head-body length of 470 to 558 millimetres (18.5 to 22.0 in). [1] No tail is discernible. Pelage is variable, with dorsal coloration ranging from cinnamon brown to blackish, and a paler underside. Individuals also have a distinctive dorsal scent gland marked by a contrasting, light-colored patch of hairs. Considerable variation exists between subspecies as currently described. The rostrum is relatively long, but well-haired, unlike the related western tree hyrax. Individuals of this species are difficult to distinguish from the related southern tree hyrax, which was previously considered conspecific; however, the fur of southern tree hyrax is usually more grizzled. [1]
The eastern tree hyrax is solitary, living in tree holes, and communicates with other individuals via repetitive vocal calls and scent marking. [1] Most roosts are occupied by only one animal, with the exception of females with one young. They are skilled climbers which feed predominantly in the canopy on tree leaves, and form large middens adjacent to roost trees.
Eastern tree hyraxes are largely restricted to montane forests, but also occur in adjacent lowland forests and even tropical dry forests on coral in Zanzibar and Pemba. They are most abundant at lower elevations, but occur as high as 3,070 meters on Mt. Kilimanjaro, albeit in reduced densities due to the scarcity of large trees. [1]
In 2015, the IUCN designated the eastern tree hyrax as Near Threatened (NT). [2] Its main threats include deforestation and hunting, and individuals often fall prey to dogs. Known natural predators include leopard, crowned eagle, and African python.
The Eastern tree hyrax is endemic to the East African countries of Tanzania and Kenya; they predominantly inhabit the foothills and montane forests of Mount Kilimanjaro, Mount Meru and the Eastern Arc Mountains. The Eastern Arcs feature an ancient chain of isolated, relict forests, stretching from the Taita Hills of Southern Kenya to the Udzungwa Mountains of Tanzania. Hyraxes are also present on the coast between Tanga Region, Tanzania, and Mombasa, Kenya, as well as on the islands of Zanzibar and Pemba. [1]
The eastern tree hyrax is currently considered to have four subspecies: [1]
The subspecific status of relict populations of Eastern Tree Hyrax described from coastal Southern Kenya is currently unclear. [6] These populations have been described as using rock crevices as habitat, contrasting with Dendrohyrax’s usually-arboreal behavior.
These subspecies display considerable vocal and morphological variation, thus, some researchers consider Eastern Tree Hyrax to represent a complex of 3-4 distinct species, with further revision required. [7]
The Zanzibar bushbaby, Matundu dwarf galago, Udzungwa bushbaby, or Zanzibar galago is a primate of the family Galagidae. An adult typically weighs 150 grams (5.3 oz), its head-body length is 14 to 15 centimetres and its tail is between 12 and 15 centimetres long. Like other species of galagos, its diet consists mainly of fruit, insects, and tree gums.
The rock hyrax, also called dassie, Cape hyrax, rock rabbit, and coney, is a medium-sized terrestrial mammal native to Africa and the Middle East. Commonly referred to in South Africa as the dassie, it is one of the five living species of the order Hyracoidea, and the only one in the genus Procavia. Rock hyraxes weigh 4–5 kg (8.8–11.0 lb) and have short ears and tails.
The Udzungwa Mountains are a mountain range in south-central Tanzania. The mountains are mostly within Iringa Region, south of Tanzania's capital Dodoma. The Udzungwa Mountains are part of the Eastern Arc Mountains, and are home to a biodiverse community of flora and fauna with large numbers of endemic species.
The Taita Hills, sometimes also spelled as Teita Hills, are a mountain range located in the Taita-Taveta County in south-eastern Kenya. The hills consist of three massifs: Dawida, Sagalla in the southern side of Voi township and Kasigau in the south near the border of Tanzania. The Dawida massif is the largest and tallest of the three, with an altitude of 2,228 metres (7,310 ft) above sea level at its highest peak, Vuria. Dabida has three other main peaks: Iyale, Wesu, and Susu.
The northern greater galago, also known as Garnett's greater galago, Garnett's galago, or the small-eared greater galago, is a nocturnal, arboreal primate endemic to Africa.
The Eastern Arc Mountains is a chain of mountains found in Kenya and Tanzania. The chain runs from northeast to southwest, with the Taita Hills being in Kenya and the other ranges being in Tanzania. They are delimited on the southwest by the fault complex represented by the Makambako Gap that separates them from the Kipengere Range. To the northeast, they are delimited by more recent volcanism represented by Mount Kilimanjaro. The chain is considered a Tentative World Heritage Site.
The Zanj sun squirrel is a species of rodent in the family Sciuridae found in eastern Africa.
Kihaule's mouse shrew is a species of mammal in the family Soricidae endemic to Tanzania where it is known only from the Udzungwa Mountains, at the western end of the Eastern Arc Mountains. Its natural habitats are subtropical or tropical moist montane forests and plantations. It is threatened by habitat destruction and the International Union for Conservation of Nature has assessed its conservation status as being "endangered". It was named after Philip M. Kihaule, a medical-entomological technician, who considerably contributed to the documenting of the small mammals of Tanzania and collected the type specimen of this shrew.
The southern tree hyrax, also known as the southern tree dassie, is a species of mammal in the family Procaviidae. The southern tree hyrax is mainly found in the south central eastern side of Africa.
The tree hyrax or tree dassie is a small nocturnal mammal native to Africa. Distantly related to elephants and sea cows, it comprises the four species in the genus Dendrohyrax, one of only three genera in the family Procaviidae, which is the only living family within the order Hyracoidea.
The western tree hyrax, also called the western tree dassie or Beecroft's tree hyrax, is a species of tree hyrax within the family Procaviidae. It can be distinguished from other hyraxes by short coarse fur, presence of white patch of fur beneath the chin, lack of hair on the rostrum, and lower crowns of the cheek teeth compared to other members of the same genus.
The yellow-spotted rock hyrax or bush hyrax is a species of mammal in the family Procaviidae. It is found in Angola, Botswana, Burundi, the Democratic Republic of the Congo, southern Egypt, Eritrea, Ethiopia, Kenya, Malawi, Mozambique, Rwanda, Somalia, northern South Africa, South Sudan, Sudan, Tanzania, Uganda, Zambia, and Zimbabwe. Its natural habitats are dry savanna and rocky areas. Hyrax comes from the Greek word ὕραξ, or shrew-mouse.
The following outline is provided as an overview of and topical guide to Tanzania:
Hyraxes, also called dassies, are small, thickset, herbivorous mammals in the order Hyracoidea. Hyraxes are well-furred, rotund animals with short tails. Typically, they measure between 30 and 70 cm long and weigh between 2 and 5 kg. They are superficially similar to pikas and marmots, but are more closely related to elephants and sea cows.
Tanzania contains some 20 percent of the species of Africa's large mammal population, found across its reserves, conservation areas, marine parks, and 17 national parks, spread over an area of more than 42,000 square kilometres (16,000 sq mi) and forming approximately 38 percent of the country's territory. Wildlife resources of Tanzania are described as "without parallel in Africa" and "the prime game viewing country". Serengeti National Park, the country's second largest national park area at 14,763 square kilometres (5,700 sq mi), is located in northern Tanzania and is famous for its extensive migratory herds of wildebeests and zebra while also having the reputation as one of the great natural wonders of the world. The Ngorongoro Conservation Area, established in 1959, is a UNESCO World Heritage Site and inhabited by the Maasai people. Its Ngorongoro Crater is the largest intact caldera in the world.
The East African montane forests is a montane tropical moist forest ecoregion of eastern Africa. The ecoregion comprises several separate areas above 2000 meters in the mountains of South Sudan, Uganda, Kenya, and Tanzania.
Northern Zanzibar–Inhambane coastal forest mosaic, also known as the Northern Swahili coastal forests and woodlands, is a tropical moist broadleaf forest ecoregion of coastal East Africa. The ecoregion includes a variety of habitats, including forest, savanna and swamps.
The Eastern Arc forests is a montane tropical moist forest ecoregion of eastern Africa. The ecoregion comprises several separate highland areas above 800 meters in Kenya, and (mostly) Tanzania.
William T. Stanley was an American mammalogist who was a manager of the collections at one of the world's largest natural history museums and a student of the mammals of eastern Africa. He was an evolutionary biologist and mammalogist, and at the time of his death was the director of the Field Museum of Natural History's Collections Center and the Collection Manager of the Field Museum's Collection of Mammals. Stanley studied the biogeography, ecology, evolution, and systematics of shrews, bats and rodents that live on mountains within Tanzania and surrounding countries.