Bulldog bat

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Bulldog bats
Temporal range: Miocene to Recent
Captive Noctilio leporinus.jpg
Greater bulldog bat (Noctilio leporinus)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Chiroptera
Suborder: Yangochiroptera
Superfamily: Noctilionoidea
Family: Noctilionidae
Gray, 1821
Genus: Noctilio
Linnaeus, 1766
Type species
Noctilio americanus
Species

N. leporinus
N. albiventris
N. lacrimaelunaris

The bat family Noctilionidae, commonly known as bulldog bats or fishing bats, is represented by two extant species, the greater and the lesser bulldog bats, [1] as well as at least one fossil species, Noctilio lacrimaelunaris , from the Miocene of Argentina. [2] The naked bulldog bat ( Cheiromeles torquatus ) does not belong to this family, but to the family Molossidae, the free-tailed bats. They are found near water in the Neotropics, from Mexico to Argentina and also in the Caribbean islands. In these areas they can be found roosting in groups within hollow trees, caves, manmade homes, or other openings with enough space. [3] [4] While the two species exhibit different social and foraging behaviors both tend to return to a main roosting spot while also visiting other alternative roosting spots. [3] [4]

Contents

Description

The bulldog bats have orange to brown fur, and range in head-body length from 7 to 14 cm and weight of 20-75 g, which makes them quite large. They have relatively long legs, large feet (exceptionally so in the case of the greater bulldog bat), and strong claws. Their wings are long (up to 60 cm in spread) and narrow, and their ears are large, funnel shaped and pointed. Unusual among bats, they have cheek-pouches for storing food. They also have full lips divided by a fold of skin giving a 'hare lip' look which together with the cheek pouches gives them their bulldog-like appearance.

Their maxillae and premaxillae are fused for the strong support of the large upper medial incisors. Dental formula: 2/1, 1/1, 1/2, 3/3 = 28. The molars are tuberculosectorial. Unlike in other bats, the last cervical vertebra is not fused with the first thoracic. The wing second finger has a long metacarpal and a vestigial phalanx. The ischia are fused to each other and to the sacrum. The latter is keel-like. [5]

Ecology and behaviour

The species of lesser bulldog bats are insectivorous, and while the greater bulldog bats also eat insects, their chief food is fish. [6] They use their echolocation to pinpoint the ripples they make on the surfaces of water. [7]

The greater bulldog bat trawls the water with its long, curved talons approximately 2–3 cm below the surface. It makes sweeps of between 30 cm and 3 m before ascending and turning to make a return sweep. In a single night, the bat may catch 20-30 small fish in this way. [8]

Related Research Articles

<span class="mw-page-title-main">Vespertilionidae</span> Family of microbats

Vespertilionidae is a family of microbats, of the order Chiroptera, flying, insect-eating mammals variously described as the common, vesper, or simple nosed bats. The vespertilionid family is the most diverse and widely distributed of bat families, specialised in many forms to occupy a range of habitats and ecological circumstances, and it is frequently observed or the subject of research. The facial features of the species are often simple, as they mainly rely on vocally emitted echolocation. The tails of the species are enclosed by the lower flight membranes between the legs. Over 300 species are distributed all over the world, on every continent except Antarctica. It owes its name to the genus Vespertilio, which takes its name from a word for bat, vespertilio, derived from the Latin term vesper meaning 'evening'; they are termed "evening bats" and were once referred to as "evening birds".

<span class="mw-page-title-main">Greater bulldog bat</span> Species of mammal

The greater bulldog bat or fisherman bat is a species of fishing bat native to Latin America. The bat uses echolocation to detect water ripples made by the fish upon which it preys, then uses the pouch between its legs to scoop the fish up and its sharp claws to catch and cling to it. It is not to be confused with the lesser bulldog bat, which, though belonging to the same genus, merely catches water insects, such as water striders and water beetles.

<span class="mw-page-title-main">Lesser bulldog bat</span> Species of bat

The lesser bulldog bat is an insectivorous and occasionally carnivorous bat of the (Neotropics), ranging through Central America and northern South America. Some unique characteristics of the bat include, large feet that are used to rake the surface of water to capture prey, and precise echolocation. Occasionally, the larger bats catch and consume small fish.

<span class="mw-page-title-main">Leaf-nosed bat</span> Family of bats

The New World leaf-nosed bats (Phyllostomidae) are 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.

<span class="mw-page-title-main">Emballonuridae</span> Family of bats

Emballonuridae is a family of microbats, many of which are referred to as sac-winged or sheath-tailed bats. They are widely distributed in tropical and subtropical regions around the world. The earliest fossil records are from the Eocene.

<span class="mw-page-title-main">Common vampire bat</span> South and central American bat

The common vampire bat is a small, leaf-nosed bat native to the Neotropics. It is one of three extant species of vampire bat, the other two being the hairy-legged and the white-winged vampire bats. The common vampire bat practices hematophagy, mainly feeding on the blood of livestock. The bat usually approaches its prey at night while they are sleeping. It then uses its razor-sharp teeth to cut open the skin of its hosts and lap up their blood with its long tongue.

<span class="mw-page-title-main">Jamaican fruit bat</span> Species of bat

The Jamaican, common, or Mexican fruit bat is a frugivorous bat species native to the Neotropics.

<span class="mw-page-title-main">Honduran white bat</span> Species of bat

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.

<span class="mw-page-title-main">Greater sac-winged bat</span> Species of bat

The greater sac-winged bat is a bat of the family Emballonuridae native to Central and South America.

<span class="mw-page-title-main">Pallid bat</span> Species of bat

The pallid bat is a species of bat that ranges from western Canada to central Mexico. It is the sole species of its genus and is closely related to Van Gelder's bat, which is sometimes included in Antrozous. Although it has in the past been placed in its own subfamily (Antrozoinae) or even family (Antrozoidae), it is now considered part of the subfamily Vespertilioninae and the tribe Antrozoini.

<span class="mw-page-title-main">Lesser ghost bat</span> Species of bat

The lesser ghost bat is a bat species found in South America. It is one of six bat species worldwide to have white fur.

<span class="mw-page-title-main">Great stripe-faced bat</span> Species of bat

The great stripe-faced bat or stripe-faced vampire bat is a bat species found from southern Mexico to Bolivia and northwestern Brazil, as well as on Trinidad. The great stripe-faced bat is a frugivore. It is one of two species within the genus Vampyrodes the other being Vampyrodes major.

<span class="mw-page-title-main">Lesser bamboo bat</span> Species of bat

The lesser bamboo bat or lesser flat-headed bat is one of the smallest species of vesper bat, and is native to Southeast Asia.

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.

<span class="mw-page-title-main">Naked-rumped pouched bat</span> Species of bat

The naked-rumped pouched bat, also known as the pouched tomb bat, is a species of sac-winged bat in the family Emballonuridae.

<span class="mw-page-title-main">Greater short-nosed fruit bat</span> Species of bat

The greater short-nosed fruit bat, or short-nosed Indian fruit bat, is a species of megabat in the family Pteropodidae found in South and Southeast Asia.

<span class="mw-page-title-main">Wahlberg's epauletted fruit bat</span> Species of bat

Wahlberg's epauletted fruit bat is a species of megabat in the family Pteropodidae. It is commonly found across southern Africa.

<span class="mw-page-title-main">Sundevall's roundleaf bat</span> Species of bat

Sundevall's roundleaf bat, also called Sundevall's leaf-nosed bat, is a species of bat in the family Hipposideridae.

<span class="mw-page-title-main">White-striped free-tailed bat</span> Species of bat

The white-striped free-tailed bat is a species of bat in the family Molossidae. Its echolocation calls are audible to humans, which is a characteristic found in only a few microbat species. The species was formerly classified as Tadarida australis.

<span class="mw-page-title-main">Bat</span> Order of flying mammals

Bats are mammals of the order Chiroptera. 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. The smallest bat, and arguably the smallest extant mammal, is Kitti's hog-nosed bat, which is 29–34 millimetres in length, 150 mm (6 in) across the wings and 2–2.6 g in mass. The largest bats are the flying foxes, with the giant golden-crowned flying fox reaching a weight of 1.6 kg and having a wingspan of 1.7 m.

References

  1. Wilson, D. E.; Reeder, D. M., eds. (2005). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. ISBN   978-0-8018-8221-0. OCLC   62265494.
  2. Naish, Darren. "Fossil Bat Stories, Part 3: Bulldog Bats".
  3. 1 2 Brooke, Anne P. (1997). "Social Organization and Foraging Behaviour of the Fishing Bat, Noctilio leporinus (Chiroptera:Noctilionidae)". Ethology. 103 (5): 421–436. doi:10.1111/j.1439-0310.1997.tb00157.x. ISSN   1439-0310.
  4. 1 2 Wohlgenant, T.; Pedersen, S.; Adkins, B.; Syme, D. M.; Pearl, D.; Merriman, C. B.; Long, J.; Dunning, D. C.; Audet, D. (1993-08-20). "Activity Patterns and Roost Selection by Noctilio albiventris (Chiroptera: Noctilionidae) in Costa Rica". Journal of Mammalogy. 74 (3): 607–613. doi:10.2307/1382280. ISSN   0022-2372. JSTOR   1382280.
  5. Vaughan, Terry A. (1978). Mammalogy. W.B. Saunders Company. ISBN   0-7216-9009-2.
  6. McDonald D. ed 2010 The Encyclopedia of Mammals Oxford University Press ISBN   978-0-19-956799-7 p466
  7. Macdonald, D., ed. (1984). The Encyclopedia of Mammals . New York: Facts on File. pp.  805. ISBN   978-0-87196-871-5.
  8. Piper, Ross (2007), Extraordinary Animals: An Encyclopedia of Curious and Unusual Animals, Greenwood Press.