Canyon bat | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Chiroptera |
Family: | Vespertilionidae |
Tribe: | Perimyotini |
Genus: | Parastrellus Hoofer et al., 2006 [2] |
Species: | P. hesperus |
Binomial name | |
Parastrellus hesperus (H.Allen, 1864) | |
Canyon bat range (pink) [3] |
The canyon bat (Parastrellus hesperus), also known as the western pipistrelle, [4] [5] or American parastrelle [6] is a species of vesper bat. It is found in Mexico and in the western United States. [1] The species has historically been placed in the genus Pipistrellus , but molecular evidence does not show any close relationship with that genus, and accordingly it was classified into its own genus, Parastrellus, in 2006. [2]
Parastrellus hesperus is the smallest bat in the United States. [7] It has a wingspan of 190–215 millimetres (7.5–8.5 in) [7] and a body length of 62–80 millimetres (2.4–3.1 in). [8] The tail is 29–30 millimetres (1.1–1.2 in), the hind feet are 5 millimetres (0.20 in), and the ears are 9 millimetres (0.35 in). [9] On average, females are slightly larger than males of this species. [8] P. hesperus ranges in color from white to pale yellow to dark brown. These bats exhibit counter shading, being dark above and lighter colored below. Their faces, ears, feet, and flight membranes are usually very dark, almost black. The pelage is 3–4 millimetres (0.12–0.16 in) long and is full and soft. The bases of all the hairs are black with the distal portions fading to lighter shades. The wings of P. hesperus are hairless except for the lower third of the interfemoral membrane; the toes also have a light sprinkling of fine hairs. [8] The wings are short and broad, giving P. hesperus a low-aspect wing which allows it to fly at speeds as low as 8.0 kilometres per hour (5 mph). [10] P. hesperus has a short, broad head and short ears with a small, club-shaped tragus. [7] [8]
It weighs 3–6 grams (0.10 – 0.21 oz.) [11]
P. hesperus is found in the deserts and lowlands of the western United States and Mexico. While it is most commonly found in the deserts of the southwestern U.S., P. hesperus occupies a range extending north to the state of Washington and south to the Mexican states of Michoacan and Hidalgo. An isolated population has been found in north-central Texas and Oklahoma. These bats prefer the lowlands and are usually the most common bats found below an elevation of 5,000 feet within their range. [7]
During the day, rock crevices serve as the preferred roosting sites for P. hesperus, although some bats have been found roosting in crevices inside mines. The bats may also be found in buildings, under rocks, and in dense growths of sedge. These roosting sites are much less frequently used than the preferred rocky crevices. [7] Due to their small size, P. hesperus are vulnerable to dehydration and desiccation. Bats of this species inhabiting barren desert areas devoid of trees and rocky outcroppings must find an appropriately sheltered roost in which to spend the daylight hours or risk death. One hypothesis is that P. hesperus spends the day in kangaroo rat burrows, but no evidence currently exists to support this. [7] In some areas, the bats may roost in the piles of rocks used to anchor the soil along the bases of highway and railroad embankments.
Parastrellus hesperus is commonly the first bat out in the evening and the last bat to be seen after sunrise. These bats are most active in the hours immediately following sunset and preceding sunrise and are usually not active during the overnight hours. On a few occasions, P. hesperus has been observed in flight during the late morning hours in full sunlight. [8]
P. hesperus is an insectivorous bat. As such, their flight is erratic and fluttery. Their low-aspect wings give these bats increased maneuverability, an important characteristic when hunting flying insects. [7] They forage in the open above small trees. [9]
P. hesperus will enter periods of hibernation when the weather grows cold or food supplies diminish. However, both male and female members of this species will sometimes emerge during the winter months to hunt, though not in the numbers commonly observed during warmer times of the year. [12] P. hesperus hibernates in mines, caves, and rocky crevices. These bats are not known to hibernate in large groups and are usually found singly. [7]
Females of P. hesperus give birth to their young in June. These bats usually have two young, but may produce only one young per mating. [7] [8] In keeping with their mostly solitary nature, females raise their young alone or in small maternity colonies of no more than a dozen bats. [7] Young are typically capable of flight within 2–3 weeks of birth. [7]
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".
Pipistrellus is a genus of bats in the family Vespertilionidae and subfamily Vespertilioninae. The name of the genus is derived from the Italian word pipistrello, meaning "bat".
The tricolored bat or American perimyotis is a species of microbat native to eastern North America. Formerly known as the eastern pipistrelle, based on the incorrect belief that it was closely related to European Pipistrellus species, the closest known relative of the tricolored bat is now recognized as the canyon bat. Its common name "tricolored bat" derives from the coloration of the hairs on its back, which have three distinct color bands. It is the smallest bat species in the eastern and midwestern US, with individuals weighing only 4.6–7.9 g (0.16–0.28 oz). This species mates in the fall before hibernation, though due to sperm storage, females do not become pregnant until the spring. Young are born helpless, though rapidly develop, flying and foraging for themselves by four weeks old. It has a relatively long lifespan, and can live nearly fifteen years.
The big brown bat is a species of vesper bat distributed widely throughout North America, the Caribbean, and the northern portion of South America. It was first described as a species in 1796. Compared to other microbats, the big brown bat is relatively large, weighing 15–26 g (0.53–0.92 oz) and possessing a wingspan of 32.5–35 cm (12.8–13.8 in).
The common pipistrelle is a small pipistrelle microbat whose very large range extends across most of Europe, North Africa, South Asia, and may extend into Korea. It is one of the most common bat species in the British Isles. In Europe, the northernmost confirmed records are from southern Finland near 60°N.
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.
Savi's pipistrelle is a species of vesper bat found across North West Africa, the Mediterranean region and the Middle East. It feeds at night on flying insects. In the summer it roosts under bark, in holes in trees, in old buildings and in rock crevices but in winter it prefers roosts where the temperature is more even such as caves, underground vaults and deep rock cracks.
Nathusius' pipistrelle is a small bat in the genus Pipistrellus. It is very similar to the common pipistrelle and has been overlooked in many areas until recently but it is widely distributed across Europe. It was described by two German naturalists, Alexander Keyserling and Johann Heinrich Blasius, and named by them after Hermann von Nathusius, in gratitude for his support of their research.
Endo's pipistrelle is a species of vesper bat that is endemic to Japan. It is found in temperate forests.
The western false pipistrelle, species Falsistrellus mackenziei, is a vespertilionid bat that occurs in Southwest Australia. The population is declining due to loss of its habitat, old growth in tall eucalypt forest which has largely been clear felled for tree plantations, wheat cultivation and urbanisation. Although it is one of the largest Australian bats of the family, the species was not recorded or described until the early 1960s. A darkly colored bat with reddish brown fur and prominent ears, they fly rapidly around the upper canopy of trees in pursuit of flying insects.
Anchieta's serotine, formerly known as Anchieta's pipistrelle, is a species of vesper bat. It is found in Angola, Democratic Republic of the Congo, South Africa, Zambia, Zimbabwe and Madagascar. The species inhabits savanna habitats.
The eastern small-footed bat is a species of vesper bat. It can be found in southern Ontario and Quebec in Canada and in mountainous portions of the eastern United States from New England to northern Georgia, and westward to northern Arkansas. It is among the smallest bats in eastern North America and is known for its small feet and black face-mask. Until recently, all North American small-footed Myotis were considered to be "Myotis leibii". The western population is now considered to be a separate species, Myotis ciliolabrum. The eastern small-footed bat is rare throughout its range, although the species may be locally abundant where suitable habitat exists. Studies suggest white-nose syndrome has caused declines in their populations. However, most occurrences of this species have only been counted within the past decade or two and are not revisited regularly, making their population status difficult to assess. Additionally, most bat populations in the eastern U.S. have been monitored using surveys conducted in caves and mines in the winter, but eastern small-footed bats hibernate in places that make them unlikely to be encountered during these surveys. Perhaps as a result, the numbers of eastern small-footed bats counted in winter tend to be low and they are relatively variable compared to other species of bats. Many biologists believe the species is stable, having declined little in recent times, but that it is vulnerable due to its relatively restricted geographic range and habitat needs.
The fringed myotis is a species of vesper bat that is found in British Columbia, Mexico, and the western United States.
The long-legged myotis is a species of vesper bat that can be found in western Canada, Mexico, and the western United States.
The banana serotine, formerly known as the banana pipistrelle, is a species of vesper bat found throughout much of Africa. It was previously known as Pipistrellus nanus, but genetic analysis later reclassified it in Neoromicia. However, more recent phylogenetic evidence indicates that it and Heller's serotine comprise the distinct genus Afronycteris.
The southern forest bat is a vesper bat found in Australia.
Falsistrellus is a genus of vespertilionid family of bats, small predatory flying mammals. They are known from Australia. The poorly researched species have been variously placed by authors, and revised again by studies of their distinct characteristics, consequently the falsistrelles may also be referred to as pipistrelles or false pipstrelles.
The Vespertilioninae are a subfamily of vesper bats from the family Vespertilionidae.
The Christmas Island pipistrelle is an extinct species of vesper bat that was found only on Christmas Island, Australia. The last individual bat was seen in August 2009 with no further sightings despite intensive efforts to locate it.
The California myotis is a species of vesper bat. It is found in British Columbia in Canada, Guatemala, Mexico, and in the western United States, including California.