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Bats are flying mammals of the order Chiroptera (/ k aɪ ˈ r ɒ p t ə r ə /). With their forelimbs adapted as wings, they are the only mammals capable of true and sustained flight. Bats are more agile in flight than most birds, flying with their very long spread-out digits covered with a thin membrane or patagium.
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bat, (order Chiroptera), any member of the only group of mammals capable of flight. This ability, coupled with the ability to navigate at night by using a system of acoustic orientation (echolocation), has made the bats a highly diverse and populous order. More than 1,200 species are currently recognized, and many are enormously abundant. Observers...
All bats have a generally similar appearance in flight, dominated by the expanse of the wings, but they vary considerably in size. The order is usually divided into two well-defined suborders: the Megachiroptera (the large Old World fruit bats) and the Microchiroptera (small bats found worldwide). Among members of the Megachiroptera, flying foxes (Pteropus) have a wingspan of 1.5 metres (about 5 feet) and a weight of 1 kg (2.2 pounds). The largest insectivorous bat is probably the naked, or hairless, bat (Cheiromeles torquatus); it weighs about 250 grams (about 9 ounces). The largest of the carnivorous bats (and the largest bat in the New World) is the spectral bat (Vampyrum spectrum), also known as the tropical American false vampire bat, with a wingspan of over 60 cm (24 inches). The tiny hog-nosed, or bumblebee, bat (Craseonycteris thonglongyai) of Thailand is one of the smallest mammals. It has a wingspan of barely 15 cm (6 inches) and weighs about 2 grams (about 0.07 ounce).
Bats vary in colour and in fur texture. Facial appearance, dominated by the muzzle and ears, varies strikingly between families and often between genera. In several families a complex fleshy adornment called the nose leaf surrounds the nostrils. Although the exact function of these facial appurtenances has yet to be determined, scientists believe they may help to direct outgoing echolocation calls (see below Orientation). Wing proportions are modified according to mode of flight. The tail and the membrane between the legs also differ, perhaps as adaptations to feeding, flight, and roosting habits. Finally, bats vary in the postures they assume when roosting, particularly in whether they hang suspended or cling to a wall and in the manner in which the wings are folded and used.
Bats are particularly abundant in the tropics. In West Africa, for example, more than 30 genera embracing nearly 100 species have been cataloged; in the United States 19 genera, totaling about 45 species, are known. Of the 18 bat families, 3—the vesper bats (family Vespertilionidae), free-tailed bats (family Molossidae), and horseshoe bats (family Rhinolophidae)—are well represented in the temperate zones. A few American leaf-nosed bats (family Phyllostomidae) range into mild temperate regions. Several vesper bats range well into Canada.
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The Vespertilionidae are found worldwide except in the polar regions and on isolated islands. The brown bats of genus Myotis have a range almost equal to that of the entire order. The free-tailed bats and sheath-tailed bats (family Emballonuridae) also encircle the Earth but are restricted to the tropics and subtropics. The horseshoe bats extend throughout the Old World, the roundleaf bats (family Hipposideridae) and Old World fruit bats (family Pteropodidae) throughout the Old World tropics, and the leaf-nosed bats throughout the New World tropics and slightly beyond. The other families have more restricted ranges.
Most bats are insectivorous, and they are important to humans primarily for their predation on insects, for pollination, and for seed dispersal. Little is known of the spectrum of insect species consumed, but the sheer quantity is formidable. The Mexican free-tailed bats of Texas have been estimated to consume about 9,100 metric tons (10,000 tons) of insects per year. Bats would thus seem to be important in the balance of insect populations and possibly in the control of insect pests.
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Some bats feed on pollen and nectar and are the principal or exclusive pollinators of a number of tropical and subtropical plants. Others feed on fruit and aid in dispersing seeds, although bananas and figs must in some cases be protected from fruit-eating bats by early harvest or by nets.
Vampire bats (family Phyllostomidae, subfamily Desmodontinae) are considered serious pests of livestock in some parts of tropical America because the small wounds they cause provide egg-laying sites for parasites and because the vampires may transmit rabies and trypanosomiasis to cattle. Other bats also carry rabies or related viruses.
The guano (droppings) of insectivorous bats is still used for agricultural fertilizer in many countries and in the past was used as a source of nitrogen and phosphorus for munitions. Large guano deposits, in addition, cover and thus preserve many archaeologically interesting artifacts and fossils in caves.
Bats. For centuries, bats have been called sinister and spooky, likely because of their beady eyes and razor-sharp fangs. But there’s more to these nocturnal creatures than meets the eyes....
Italian bat species to which EUROBATS applies. Thirty-four bat species are currently present in Italy, belonging to 11 genera and four families. Moreover, two species were recorded in the past ( Rhinolophus blasii and Myotis dasycneme) but no recent confirmation of their occurrence is available. Finally, one taxon, Myotis aurascens, also occur ...
11 mag 2024 · Bats are mammals belonging to the order Chiroptera, a name of Greek origin meaning "hand-wing," which accurately describes the animal's most unusual anatomical feature. The order is divided into two suborders, the Megachiroptera, consisting of a single family, the flying foxes and their Old World fruit and flower eating relatives ...
At Bat Conservation International we follow the One Health framework through conservation initiatives that protect bats and their habitats, for the sustainable coexistence of bats and humans with reduced risk of pathogen spillover.
Info about bats. Italian bat species. Myths about bats. From the press. How to help protecting bats. Batty FAQ. Links. The main scientific articles on bats published by Italian scientists. Ultimo aggiornamento 27.09.2013.
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