Lesser long-nosed bat

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Lesser long-nosed bat
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Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Chiroptera
Family: Phyllostomidae
Genus: Leptonycteris
Species:
L. yerbabuenae
Binomial name
Leptonycteris yerbabuenae
Martinez & Villa, 1940
Leptonycteris yerbabuenae map.svg
Synonyms

L. nivalis yerbabuenae
L. curasoae yerbabuenae
L. sanborni, Hoffmeister, 1957

Contents

The lesser long-nosed bat (Leptonycteris yerbabuenae) is a medium-sized bat found in Central and North America. [1] It is sometimes known as Sanborn's long-nosed bat or the Mexican long-nosed bat, though the latter name is better avoided since it is also used for the entire genus Leptonycteris and for one of the other species in it, the greater long-nosed bat (L. nivalis).

Originally described as a subspecies of the greater long-nosed bat, [2] it was later considered a subspecies of the southern long-nosed bat, before being confirmed as a distinct species. [1] Enthusiasts for the bats often refer to them simply as leptos because they are the best known members of the genus Leptonycteris.[ citation needed ] The scientific name is derived from the type locality, near Yerbabuena in Guerrero, Mexico. [2]

Description

Lesser long-nosed bats are relatively small bats, with a total length as adults of around 8 centimetres (3.1 in), and weighing between 15 and 25 grams (0.53 and 0.88 oz), depending on the time of year. Males and females are similar in size, and virtually indistinguishable. As their common name implies, they have a long, narrow snout, and this terminates in a small triangular nose-leaf. While they do have three internal caudal vertebrae, they have no visible tail. [2]

The tongue of lesser long-nosed bats has a number of adaptations for lapping nectar, including long ridges and rough, conical papillae, [3] which may also help protect against periodontal disease by scraping the teeth clean. Their wings have a high wing loading, allowing for energy efficient long-distance flight in open habitats, at the expense of manoeuvrability. [4]

Only three other species of North American bat have a nose-leaf, and two of these, the Mexican long-tongued bat, and the California leaf-nosed bat, have a distinct tail, and also, in the latter case, much larger ears than lesser long-nosed bats do. They are more easily confused with their close relatives, the greater long-nosed bats, but, in addition to being about 10% larger, the latter have shorter, greyish fur, and proportionately longer wings. [2]

Adult lesser long-nosed bats are yellow-brown or grey above, with rusty brown fur below. Their ears are small.

Distribution and habitat

Lesser long-nosed bats inhabit semi-arid grassland, scrub, or forest habitats below about 550 metres (1,800 ft). They are able to tolerate unusually high temperatures of up to 41 °C (106 °F), due in part to a low metabolic rate. They do not enter torpor or hibernate, but die at ambient temperatures of below about 10 °C (50 °F). [5]

In the north, they reach southern California, Arizona and New Mexico. However, they are only found as summer migrants in the United States and, more generally, north of the mid-Sonora, arriving in these regions between April and July, and migrating south again in September. [2] Some individuals have been estimated to migrate as far as 1,600 kilometres (990 mi) each year. [6] Their migratory patterns have been shown to follow a path determined by seasonal availability of food plants, with cacti, Agave , and plants of the C3 metabolic pathway being strong predictors of distribution. [7] They are found year-round in the western and southern parts of Mexico, and along the east coast, and in Guatemala, El Salvador, and Honduras. [2]

There are no recognised subspecies.

Diet and behaviour

Lesser long-nosed bats feed mainly on nectar from night-blooming plants such as saguaro, organ pipe cactus, [8] as well as century plant and other agaves. They are important pollinators of night-blooming cactus. [9] They may also eat some cactus fruits, and, during the winter, on pollen from a range of other plants as the opportunity arises. [2]

Lesser long-nosed bats roost during the day in large colonies of up to several thousand individuals in caves or abandoned mines, dispersing at night to feed. The size and composition of such colonies varies throughout the year, as the bats migrate to summer feeding grounds. At some times of the year, many colonies become occupied only by nursing females and their young, with males occupying smaller temporary roosts. [2]

Reproduction

The breeding season lasts from November to December for bats that migrate northward during the summer, but from May to June in those that give birth in the south. Despite the presence of two distinct mating seasons, individual bats mate only once a year. Gestation lasts about six months, and results in the birth of a single pup, during the time of local peak flower availability. [2]

Newborn young weigh 4 to 7 grams (0.14 to 0.25 oz) and are fully weaned at four to eight weeks of age. They are able fly after a month, but do not begin to exit the maternity cave for a further two to three weeks. They are known to live for up to at least eight years in the wild. [2]

Related Research Articles

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

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.

<span class="mw-page-title-main">Saussure's long-nosed bat</span> Species of mammals belonging to the New World leaf-nosed bat family

The Saussure's long-nosed bats or Mexican long-nosed bats form the genus Leptonycteris within the leaf-nosed bat family Phyllostomidae. Like all members of the family, they are native to the Americas. According to ITIS, three species are currently recognised, though varying placements of the populations into species and subspecies will be encountered. The species recognised by ITIS are:

<span class="mw-page-title-main">Long-tongued nectar bat</span> Species of bat

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

The long-tongued fruit bat is a species of megabat. It is nectarivorous, feeding on nectar from primarily banana flowers. It is found in several countries in South and Southeast Asia.

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

The lesser long-tongued bat, also called the lesser long-tailed bat, is a bat species from South America.

<span class="mw-page-title-main">Dark long-tongued bat</span> Species of mammal belonging to the New World leaf-nosed bat family

The dark long-tongued bat is a species of bat from South and Central America. It was formerly considered the only species within the genus Lichonycteris, but is now recognized as one of two species in that genus, along with the pale brown long-nosed bat. It is small species of bat, with adults weighing 6–11 g (0.21–0.39 oz) and having a total length of 46–63 mm (1.8–2.5 in).

<i>Anoura</i> Genus of bats

Anoura is a genus of leaf-nosed bats from Central and South America. Anoura members lack or have a short tail, and are nectarivorous bats of small to medium size among the Phyllostomidae.

<span class="mw-page-title-main">Mexican long-tongued bat</span> Species of bat

The Mexican long-tongued bat is a species of bat in the family Phyllostomidae. It is the only species within the genus Choeronycteris. The species is found in El Salvador, Guatemala, Honduras, Mexico, and the United States.

<span class="mw-page-title-main">Underwood's long-tongued bat</span> Species of mammals belonging to the New World leaf-nosed bat family

Underwood's long-tongued bat is a species of bat in the family Phyllostomidae. It is the only species within the genus Hylonycteris. It is found in Belize, Guatemala, Mexico, Nicaragua, and Panama. Hylonycteris underwoodi feed on nectar, pollen grains, agave and fruits. This choice of food has allowed them to gain the ability of hovering flight, thereby evolving their body mass and size to compensate for the same.

<span class="mw-page-title-main">Southern long-nosed bat</span> Species of bat

The southern long-nosed bat is a South American species of bat in the family Phyllostomidae.

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

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<span class="mw-page-title-main">Leach's single leaf bat</span> Species of bat

Leach's single leaf bat, also known as Greater Antillean long-tongued bat, is a species of bat in the family Phyllostomidae. It is found in the southern Bahamas and in all the Greater Antilles. It forms large colonies, with up to a few hundred thousand individuals, and feeds on a relatively wide variety of food items including pollen, nectar, fruit and insects.

<span class="mw-page-title-main">Banana bat</span> Species of mammals belonging to the New World leaf-nosed bat family

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

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

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Long-nosed bat may refer to:

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References

  1. 1 2 3 Medellín, R. (2016). "Leptonycteris yerbabuenae". IUCN Red List of Threatened Species . 2016: e.T136659A21988965. doi: 10.2305/IUCN.UK.2016-1.RLTS.T136659A21988965.en . Retrieved 12 November 2021.
  2. 1 2 3 4 5 6 7 8 9 10 Cole, F.R.; Wilson, D.E. (2006). "Leptonycteris yerbabuenae". Mammalian Species. 797: Number 797: pp. 1–7. doi: 10.1644/797.1 .
  3. Howell, D.J.; Hodgkin, N. (1976). "Feeding adaptations in the hairs and tongues of nectar-feeding bats". Journal of Morphology. 148 (3): 329–336. doi:10.1002/jmor.1051480305. PMID   1255733. S2CID   1396634.
  4. Sahley, C.T.; et al. (1993). "Flight speeds and mechanical power outputs of the nectar-feeding bat, Leptonycteris curasoae (Phyllostomidae: Glossophaginae)". Journal of Mammalogy. 74 (3): 594–600. doi:10.2307/1382278. JSTOR   1382278.
  5. Carpenter, R.E. & Graham, J.B. (1967). "Physiological responses to temperature in the long-nosed bat, Leptonycteris sanborni". Comparative Biochemistry and Physiology. 22 (3): 709–722. doi:10.1016/0010-406X(67)90764-5. PMID   6053639.
  6. Wilkinson, G.S.; Fleming, T.H. (1996). "Migration routes and evolution of lesser long-nosed bats, Leptonycteris curasoae, inferred from mitochondrial DNA". Molecular Ecology. 5 (3): 329–339. doi:10.1046/j.1365-294X.1996.00081.x. S2CID   14617422.
  7. Burke, Rachel A.; Frey, Jennifer K.; Ganguli, Amy; Stoner, Kathryn E. (September 2019). "Species distribution modelling supports "nectar corridor" hypothesis for migratory nectarivorous bats and conservation of dry tropical forest". Diversity and Distributions. 25 (9): 1399–1415. doi: 10.1111/ddi.12950 . JSTOR   26740117.
  8. Fleming, T.H.; et al. (1993). "Seasonal changes in the diets of migrant and non-migrant nectarivorous bats as revealed by carbon stable isotope analysis". Oecologia. 94 (1): 72–75. Bibcode:1993Oecol..94...72F. doi:10.1007/BF00317304. PMID   28313861. S2CID   22082048.
  9. Godinez-Alvarez, H.; Valiente-Banuet, A. (2000). "Fruit-feeding behavior of the bats Leptonycteris curasoae and Choeronycteris mexicana in flight cage experiments: consequences for dispersal of columnar cactus seeds". Biotropica. 32 (3): 552–556. doi:10.1111/j.1744-7429.2000.tb00502.x. S2CID   247706238.