Pel's flying squirrel | |
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Pel's Anomalure, Ankasa Conservation Area, Ghana | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Rodentia |
Family: | Anomaluridae |
Genus: | Anomalurus |
Species: | A. pelii |
Binomial name | |
Anomalurus pelii | |
Subspecies | |
A. p. auzembergeriMatschie, 1914 Contents |
Pel's flying squirrel or Pel's scaly-tailed squirrel (Anomalurus pelii) is a species of rodent in the family Anomaluridae. It is found in Liberia, Ivory Coast, and Ghana, where it lives in lowland tropical rainforests. It is named after Hendrik Pel.
The tropical forests of Africa were little explored by Europeans before the nineteenth century. Colugos and flying squirrels had been known from south eastern Asia and gliding marsupials from Australia earlier than this, but the discovery of the scaly-tailed squirrels of equatorial Africa was not made till the 1840s. British zoologist and collector Louis Fraser exploring the Niger basin brought a specimen of Lord Derby's scaly-tailed squirrel (Anomalurus derbianus) back to Britain. Compared to the previously known flying squirrels, this had two rows of large scales on the underside of the basal part of its tail. The flying membrane stretched from wrist to ankle and was supported by a cartilaginous strip which had its origin at the elbow. (The east Asian flying squirrels have a similar cartilage strip, but it terminates at the wrist.) The scaly tailed squirrels had an additional membrane extending from the ankle to part-way along the tail, and when extended, the membrane formed a straight line from heel to heel. [2]
Ten years later, a specimen of another species, Pel's flying squirrel, was brought to Europe and showed similar anatomical features. The hands and feet had the digits close together with strongly curved nails. The tail was also unusual in that the free part resembled the shape of a feather, with the large cornified scales a prominent feature on the underside. The animal's fur was described as soft and supple, without any spines. [2]
Pel's flying squirrel is a large species, with a head-and-body length of 400 to 540 mm (16 to 21 in) and a tail of 320 to 550 mm (13 to 22 in). It weighs between 1,300 to 2,000 g (46 to 71 oz) The upper parts are mainly black, with some white patches, while the underparts are white. The margin of the patagium, the membrane joining the wrist with the ankle, is partly white, and that of the uropatagium, joining the ankles and tail, is all white. The ears are of average size and partly naked, the forefeet are mostly black, the hind feet often have white patches and the tail is plume-like. [2]
Pel's flying squirrel is native to West Africa where its range includes eastern Liberia, southern Ivory Coast and southwestern Ghana. It occurs in the tropical rainforest at low altitudes, particularly where there are tall, emergent trees and palms trees, in areas with annual precipitation in the range 1,400 to 3,900 millimetres (55 to 154 in). [1] However, it appreciates separate trees that are not wreathed in lianas, because when it emerges from its den at night, it needs space to glide down to lower levels to feed. [2]
Pel's flying squirrel is wholly nocturnal, spending the day in a hole in a tree and only emerging after dark. It feeds on bark, supplemented with fruits, flowers and leaves. It usually occurs in pairs, but as many as six individuals have been found sharing the same nesting site in a tree. If disturbed in its den, this squirrel snaps its teeth and hisses, and the sound may be amplified by the acoustics of the hollow tree. [2] Given its large size, bold colouration and aggressive behaviour, this species may be able to drive off potential predators such as birds of prey, small carnivores and primates, and compete successfully with hornbills for nest sites. [2]
The reproduction of this species is poorly known. In Ghana, litters seem to occur twice a year, in April and September, [2] with two or three young in each litter, occasionally four. A copulatory plug is present in the vagina during pregnancy and the young are fully furred and have their eyes open at birth. The young remain in the nest and both parents bring them food. [3]
The tropical forests where this flying squirrel lives are under threat because of timber harvesting and the conversion of the land to agricultural use. The animal is also under threat from hunters and is sometimes to be seen on sale as bushmeat in markets. As a secretive, nocturnal species, its population size and natural history are little known, and the International Union for Conservation of Nature and has rated it as "least concern". [1]
Petauridae is a family of possums containing 11 species: four species of trioks and striped possum, six species of wrist-winged glider, and Leadbeater's possum, which has only vestigial gliding membranes. Most of the wrist-winged gliders are native to Australia, whereas most of the striped possums to New Guinea, but some members of each group are found on both sides of the Torres Strait. Leadbeater's possum is endemic to Victoria, Australia.
Flying squirrels are a tribe of 50 species of squirrels in the family Sciuridae. Despite their name, they are not in fact capable of full flight in the same way as birds or bats, but they are able to glide from one tree to another with the aid of a patagium, a furred skin membrane that stretches from wrist to ankle. Their long tails also provide stability as they glide. Anatomically they are very similar to other squirrels with a number of adaptations to suit their lifestyle; their limb bones are longer and their hand bones, foot bones, and distal vertebrae are shorter. Flying squirrels are able to steer and exert control over their glide path with their limbs and tail.
The Anomaluridae are a family of rodents found in central Africa. They are known as anomalures or scaly-tailed squirrels. The six extant species are classified into two genera.
The squirrel glider is a nocturnal gliding possum. The squirrel glider is one of the wrist-winged gliders of the genus Petaurus.
The long-eared flying mouse or long-eared scaly-tailed flying squirrel, is a species of flying mouse from western and central Africa. It is not actually a squirrel, nor a mouse, though it is a rodent. Not much is known about them because they are very hard to keep alive in captivity.
The flying mice, also known as the pygmy scaly-tails, pygmy scaly-tailed flying squirrels, or pygmy anomalures are not true mice, not true squirrels, and are not capable of true flight. These unusual rodents are essentially miniaturized versions of anomalures and are part of the same sub-Saharan African radiation of gliding mammal.
Commonly referred to as the Old World flying squirrels, the genus Pteromys is distributed across temperate Eurasia, the Korean Peninsula and Japan. Although there are a host of flying squirrel genera in Asia, Pteromys is the only one present in Europe.
A number of animals are capable of aerial locomotion, either by powered flight or by gliding. This trait has appeared by evolution many times, without any single common ancestor. Flight has evolved at least four times in separate animals: insects, pterosaurs, birds, and bats. Gliding has evolved on many more occasions. Usually the development is to aid canopy animals in getting from tree to tree, although there are other possibilities. Gliding, in particular, has evolved among rainforest animals, especially in the rainforests in Asia where the trees are tall and widely spaced. Several species of aquatic animals, and a few amphibians and reptiles have also evolved this gliding flight ability, typically as a means of evading predators.
Anomalurus is the largest genus in the rodent family Anomaluridae, with four species. It is the only genus in the subfamily Anomalurinae.
Shelley's eagle-owl is a species of owl in the family Strigidae. Despite its large size, it is a very little-known, rarely studied owl that occurs in very small numbers. A specimen was photographed in the wild for the first time on 16 October 2021 in the Atewa Range Forest Reserve in southeastern Ghana.
Beecroft's flying squirrel or Beecroft's scaly-tailed squirrel, is a species of rodent in the family Anomaluridae. Some authorities consider it to be monotypic within the genus Anomalurops. Its natural habitats are subtropical or tropical dry forests, subtropical or tropical moist lowland forests, and plantations. It is threatened by habitat destruction but is a common species with a wide range and the International Union for Conservation of Nature has rated its conservation status as being of "least concern".
The dwarf scaly-tailed squirrel is a species of rodent in the family Anomaluridae. It is found in Cameroon, Central African Republic, Republic of the Congo, Democratic Republic of the Congo, Equatorial Guinea, Gabon and Uganda. The species is nocturnal and arboreal and lives in subtropical or tropical lowland rainforest. Membranes attached to its limbs and tail enable it to glide between trees. This squirrel is currently not considered to be threatened by habitat destruction; "much of the habitat within parts of the known range of this species is relatively intact, and the species is unlikely to be experiencing any significant declines."
The red and white giant flying squirrel is a species of rodent in the family Sciuridae. It is a very large, dark rufous-red, buff and white flying squirrel found in forests at altitudes of 800–3,500 m (2,600–11,500 ft) in mainland China and 1,200–3,750 m (3,940–12,300 ft) in Taiwan, although the population of the latter island is distinctive and likely better regarded as a separate species, the Taiwan giant flying squirrel. Additionally, the red and white giant flying squirrel possibly ranges into northeastern South Asia and far northern Mainland Southeast Asia. This squirrel has a wide range and is relatively common, and the International Union for Conservation of Nature lists it as being of "least concern".
The forest giant squirrel or Stanger's squirrel is a species of rodent in the family Sciuridae found in Angola, Benin, Burundi, Cameroon, the Central African Republic, the Republic of the Congo, the Democratic Republic of the Congo, Ivory Coast, Equatorial Guinea, Gabon, Ghana, Kenya, Liberia, Nigeria, Rwanda, Sierra Leone, Tanzania, Togo, and Uganda. Its natural habitats are subtropical or tropical moist lowland forests and plantations.
The Cameroon scaly-tail, also referred to as the Cameroon anomalure, flightless anomalure or flightless scaly-tail, is a rodent species endemic to West Central Africa. The scientific literature has never reported observations of live individuals. The taxonomic classification of the species has been subject to recent revision.
Lord Derby's scaly-tailed squirrel is an anomalurid rodent native to Africa. It was named after Edward Smith-Stanley, 13th Earl of Derby.
Zenkerella is a genus of rodent, the only member of the family Zenkerellidae. It was formerly classified in Anomaluridae until phylogenetic studies made its distinctiveness clear. While the Anomalurus of the family Anomaluridae has gliding membranes between its forelimb and hindlimb, the Zenkerella has no such adaptation. It is estimated from fossil records that this divergence might have occurred in the middle of the Eocene.
The Japanese dwarf flying squirrel is one of two species of Old World flying squirrels in the genus Pteromys. During the day this squirrel hides in a hole, usually in a coniferous tree, emerging at night to feed.
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