Visored bat | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Chiroptera |
Family: | Phyllostomidae |
Genus: | Sphaeronycteris Peters, 1882 |
Species: | S. toxophyllum |
Binomial name | |
Sphaeronycteris toxophyllum Peters, 1882 | |
The visored bat, (Sphaeronycteris toxophyllum), is a bat species from tropical South America. It is the only species in the genus Sphaeronycteris. Although visored bats have some unique characteristics, they are thought to be most closely related to little white-shouldered bats and wrinkle-faced bats. [2]
Visored bats range from 52 to 63 millimetres (2.0 to 2.5 in) in head-body length. They have greyish-brown fur becoming paler towards the front of the body, grey or brownish-white underparts, and white spots on each shoulder and just below the ears. They have a rounded head, with a short, hairless, snout, a wide mouth, and bulging golden-brown eyes. The ears are triangular, with a narrow tragus. Their most distinctive feature, however, is the presence of the "visor" for which they are named - a structure not found in any other bat species. [2]
The visor consists of a horny outgrowth above and behind the horseshoe-shaped nose-leaf. In females it is a relatively small ridge-like structure, and located above the centre of each eye, from where it connects to a central ridge behind the nose-leaf. In adult males, it is much larger, reaching four times the size in females, and stretches all the way to the lateral corners of the eyes. [3] Another unusual feature of male visored bats is the presence of a large fold of skin on the neck, which can be pulled up over the face as a mask while sleeping; the fold is much smaller and apparently non-functional in females. [2]
Visored bats are found throughout Venezuela, in eastern Colombia, and across the eastern Amazon basin and neighbouring areas, including eastern Ecuador and Peru, western Brazil and northern Bolivia. [1] No subspecies are known. They inhabit a range of forest environments from tropical rainforest to montane cloud forest, and from sea level to 3,000 metres (9,800 ft) along the eastern slopes of the Andes. Although their natural habitat appears to be dense forest, they have also been captured in man-made pastures and urban areas. [2]
Relatively little is known of the biology of visored bats, because they seem to be rare, and only a few specimens have been collected. [1] They are nocturnal, and either solitary or found in pairs; some have been found roosting in underground cavities, and others in fig trees. They feed solely on fruit, and breed twice each year, at the beginning and end of the rainy season. [2]
Horseshoe bats are bats in the family Rhinolophidae. In addition to the single living genus, Rhinolophus, which has about 106 species, the extinct genus Palaeonycteris has been recognized. Horseshoe bats are closely related to the Old World leaf-nosed bats, family Hipposideridae, which have sometimes been included in Rhinolophidae. The horseshoe bats are divided into six subgenera and many species groups. The most recent common ancestor of all horseshoe bats lived 34–40 million years ago, though it is unclear where the geographic roots of the family are, and attempts to determine its biogeography have been indecisive. Their taxonomy is complex, as genetic evidence shows the likely existence of many cryptic species, as well as species recognized as distinct that may have little genetic divergence from previously recognized taxa. They are found in the Old World, mostly in tropical or subtropical areas, including Africa, Asia, Europe, and Oceania.
The New World leaf-nosed bats (Phyllostomidae) are bats found from southern North America to South America, specifically from the Southwest United States to northern Argentina. They are ecologically the most varied and diverse family within the order Chiroptera. Most species are insectivorous, but the phyllostomid bats include within their number true predatory species and frugivores. For example, the spectral bat, the largest bat in the Americas, eats vertebrate prey, including small, dove-sized birds. Members of this family have evolved to use food groups such as fruit, nectar, pollen, insects, frogs, other bats, and small vertebrates, and in the case of the vampire bats, even blood.
The Honduran white bat, also called the Caribbean white tent-making bat, is a species of bat in the family Phyllostomatidae. It is the only member of the genus Ectophylla. The genus and the species were both scientifically described for the first time in 1892. It has distinctive, entirely white fur, which is only found in six of the roughly 1,300 known species of bat. It constructs "tents" out of understory plant leaves by strategically cutting the leaf ribs with its teeth; it roosts in these tents during the day. It is a specialist frugivore, consuming almost exclusively the fruits of one species of fig. Females can likely become pregnant twice per year, giving birth to one offspring at a time.
The little white-shouldered bat is a species of bat from South and Central America. It is the only species within its genus, the name of which translates as "reaper" or "destroyer".
The Brazilian big-eyed bat is a species of phyllostomid bat from South America. The scientific name honours Italian naturalist Giacomo Doria.
The silver fruit-eating bat is a South American bat species of the family Phyllostomidae.
The Ipanema bat is a bat species of order Chiroptera and family Phyllostomidae. It is found in northern Argentina, Bolivia, southeastern Brazil and Paraguay. It is the only species within its genus.
The tent-making bat is an American leaf-nosed bat (Phyllostomidae) found in lowland forests of Central and South America. This medium-sized bat has a gray coat with a pale white stripe running down the middle of the back. Its face is characterized by a fleshy noseleaf and four white stripes. Primarily a frugivore, it may supplement its diet with insects, flower parts, pollen, and nectar. Its common name comes from its curious behavior of constructing tents out of large, fan-shaped leaves. These roosts provide excellent protection from the tropical rains, and a single tent roost may house several bats at once. This bat is quite common in its geographic range; hence, its conservation status is listed as Least Concern.
The variegated butterfly bat is a species of vesper bat. It is sometimes also called the leaf-winged bat, or simply the butterfly bat. It is not currently endangered, but may be threatened by habitat loss in some parts of its range.
The silver-haired bat is a solitary migratory species of vesper bat in the family Vespertilionidae and the only member of the genus Lasionycteris.
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.
The flat-faced fruit-eating bat is a South American species of bat in the family Phyllostomidae. It is sometimes considered a subspecies of the Jamaican fruit bat, but can be distinguished by its larger size, the presence of faint stripes on the face, and of a third molar tooth on each side of the upper jaw. Genetic analysis has also shown that the two species may not be closely related.
Wahlberg's epauletted fruit bat is a species of megabat in the family Pteropodidae. It is commonly found across southern Africa.
Sundevall's roundleaf bat, also called Sundevall's leaf-nosed bat, is a species of bat in the family Hipposideridae.
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.
Schneider's leaf-nosed bat or Schneider's roundleaf bat is a species of bat in the family Hipposideridae. It is endemic to South Asia. Its natural habitats are subtropical or tropical dry forests, caves, and urban areas.
The Cuban fig-eating bat, or white-shouldered bat, is a species of bat in the family Phyllostomidae, found only in the Caribbean. It is the sole extant species in the genus Phyllops, although two other species, P. vetus and P. silvai, are known from fossils.
The hairy yellow-shouldered bat is a species of bat in the family Phyllostomidae native to South America. There are no recognised subspecies.
Horsfield's fruit bat is a species of megabat native to South East Asia. It is named for Thomas Horsfield, an American naturalist who presented the type specimen to the British Museum.
The little yellow-shouldered Mesoamerican bat is a species of leaf-nosed bat found in Mexico and Central America.