Silver-tipped myotis

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Silver-tipped myotis
Silver-tipped myotis imported from iNaturalist photo 402043977 on 27 October 2024.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Chiroptera
Family: Vespertilionidae
Genus: Myotis
Species:
M. albescens
Binomial name
Myotis albescens
Geoffroy, 1806
Myotis albescens map.png
Silver-tipped Myotis Bat range
1774 drawing of silver-tipped myotis head Myotis albescens.jpg
1774 drawing of silver-tipped myotis head

The silver-tipped myotis (Myotis albescens) is a species of mouse-eared bat found in a range of lowland habitats in the Americas.

Contents

It is part of the vesper bat genus Myotis , which includes many common species across the world. Genetic analysis suggests that it is probably most closely related to a group of Neotropical Myotis species that includes Myotis nigricans , Myotis levis , and Myotis oxyotus , [2] or alternatively to Myotis dominicensis alone. [3]

Description

The silver-tipped myotis is a small bat, with a total length of 7.9 to 9.6 centimetres (3.1 to 3.8 in), and a tail 2.7 to 4.0 centimetres (1.1 to 1.6 in) long. [4] The fur is long and silky, with individual hairs being black or dark brown for most of their length, but white at the tips. This silver ticking gives the bat its common name and "frosted" appearance. Although fur with a similar pattern is found on the undersides of some related species, only in the silver-tipped myotis does it extend across the entire body, thus enabling it to be distinguished from some otherwise very similar bats. [5]

The undersides and legs of the animal are paler than the rest of the body, and the bare skin of the wings varies from light brown to almost black, depending on the individual. The bat has a rounded head with narrow, pointed ears, and unusually large feet. The membranes of the wings attach to the toes at their hindmost part, while the membrane between the legs is partially supported by a long calcar that actually extends beyond its edge to end in a small rounded lump. [5]

Distribution

The silver-tipped myotis is one of the most widespread members of its genus, being known from every country of South America except Chile and French Guiana. [5] It is possible that it does occur in French Guiana, but has not yet been recorded. [6] In the northern part of its range it is found in Panama, Costa Rica, Nicaragua, Honduras, Guatemala, and parts of Chiapas and Veracruz in southern Mexico. [7] Its wide range is partly due to a tolerance for a wide range of lowland habitats, including forests, shrublands, open wetlands, and pasture below 500 metres (1,600 ft) elevation. [5] However, it usually occurs near open water. [6] It is absent in the Andes and in the colder environments of central and southern Argentina. [5]

There are no recognised subspecies.

Behavior

Like most bats, silver-tipped myotises are nocturnal, and are most active immediately after sunset and before dawn. They spend the day roosting in small groups in holes or crevices in trees or cliffs, typically close to water. They are not cave-roosting bats, preferring more open environments with some degree of ventilation and light. In more settled areas, they are commonly found roosting under roofs, or inside attic spaces. Although they may occasionally become torpid during cold nights, they do not hibernate. [5]

They have been reported to feed on beetles, flies, lepidopterans, and spiders. [8] They are generally slow flying bats, [9] flying low to the ground or water, and grabbing insects with their large feet. [10] While hunting, they have been reported to use short, 2 to 5 millisecond, frequency modulated calls, sweeping down from 75 to 43 kHz, at sound levels of up to at least 111 dB. [11]

Reproduction

Males and females roost together, and the females are promiscuous, mating with several of their partners. There is no particular breeding season over most parts of the range, and females typically give birth to two or three young every year. Fertilisation does not occur for up to three months after mating indicating that females can likely store sperm in their bodies for this time, thus being able to control the timing of their pregnancy. [5] Gestation lasts about three months, and results in the birth of a single young. [5]

The young are weaned at about one month of age, by which time all their permanent teeth have erupted. Females become sexually mature at just two months, although males are not fertile for six or seven months after birth. [5]

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">Spectral bat</span> Species of bat

The spectral bat, also called the great false vampire bat, great spectral bat, American false vampire bat or Linnaeus's false vampire bat, is a large, carnivorous leaf-nosed bat found in Mexico, Central America, and South America. It is the only member of the genus Vampyrum; its closest living relative is the big-eared woolly bat. It is the largest bat species in the New World, as well as the largest carnivorous bat: its wingspan is 0.7–1.0 m (2.3–3.3 ft). It has a robust skull and teeth, with which it delivers a powerful bite to kill its prey. Birds are frequent prey items, though it may also consume rodents, insects, and other bats.

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

<span class="mw-page-title-main">Mouse-eared bat</span> Genus of bats

The mouse-eared bats or myotises are a diverse and widespread genus (Myotis) of bats within the family Vespertilionidae. The noun "myotis" itself is a Neo-Latin construction, from the Greek "muós and "oûs", literally translating to "mouse-eared".

<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">New Zealand long-tailed bat</span> Species of bat

Chalinolobus tuberculatus, known more commonly as the New Zealand long-tailed bat, the long-tailed wattle bat or pekapeka tou-roa, is a small insectivorous mammal within the genus Chalinolobus. The long-tailed bat is one of 7 species belonging to the genus Chalinolobus, which are commonly referred to as “wattled bats,” “pied bats” and “long-tailed bats." The genus Chalinolobus is characterised by fleshy lobes located on their lower lips and at the bottom of their ears. Some zoologists claim there is overlap between the Chalinolobus genus and the Glauconycteris genus.

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

The black myotis is a vesper bat species from South and Central America.

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

The velvety myotis, is a species of vesper bat from South America.

<span class="mw-page-title-main">Little big-eared bat</span> Species of bat

The little big-eared bat is a bat species in the order Chiroptera and family Phyllostomidae. It is from South and Central America particularly Colombia, Venezuela, Guyana, French Guiana, Brazil, Peru, Ecuador, Bolivia, Argentina, Paraguay, Suriname and Trinidad. Though its exact population is unknown, it is considered widespread and occurs in protected areas, although deforestation may be a minor threat, it is classified as Least Concern. It is found in multistratal evergreen forests and dry thorn forests and forages near streams and is found hollow trees, logs, caverns, or houses with groups up to twelve. The head and body length measures at 44 millimetres (1.7 in) for males and 45 millimetres (1.8 in) for females. Males usually weigh about 5 grams (0.18 oz) while females weigh 5.7 grams (0.20 oz).

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

Hodgson's bat, also called the copper-winged bat or black-and-orange myotis, is a species of vesper bat in the genus Myotis, the mouse-eared bats. Favouring mountain forests, it is found throughout Central, Southeast, and East Asia, from Afghanistan to Taiwan. It is about 5 centimetres (2.0 in) long and is distinguished from most other species of bat in this range by its yellowish colouration.

<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.

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

The long-legged myotis is a species of vesper bat that can be found in western Canada, Mexico, and the western United States.

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

The golden-tipped bat is a species of Microchiropteran in the family Vespertilionidae. It is found in Papua New Guinea and in Australia, especially scattered along the eastern part of Australia. The species is considered uncommon, and is listed as endangered in Australia.

<span class="mw-page-title-main">Little brown bat</span> Species of mammal found in North America

The little brown bat or little brown myotis is an endangered species of mouse-eared microbat found in North America. It has a small body size and glossy brown fur. It is similar in appearance to several other mouse-eared bats, including the Indiana bat, northern long-eared bat, and Arizona myotis, to which it is closely related. Despite its name, the little brown bat is not closely related to the big brown bat, which belongs to a different genus.

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

The cinnamon red bat is a species of bat in the family Vespertilionidae. It was first described from a specimen that had been collected in Chile. For more than one hundred years after its initial description, it was largely considered a synonym of the eastern red bat. From the 1980s onward, it was frequently recognized as distinct from the eastern red bat due to its fur coloration and differences in range. It has deep red fur, lacking white "frosting" on the tips of individual hairs seen in other members of Lasiurus. It has a forearm length of 39–42 mm (1.5–1.7 in) and a weight of 9.5–11.0 g (0.34–0.39 oz).

<i>Myotis midastactus</i> Species of bat

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<span class="mw-page-title-main">Maternity colony</span> Temporary association of reproductive female bats

A maternity colony refers to a temporary association of reproductive female bats for giving birth to, nursing, and weaning their pups. The colonies are initiated by pregnant bats. After giving birth, the colony consists of the lactating females and their offspring. After weaning, juveniles will leave the maternity colony, and the colony itself will break apart. The size of a maternity colony is highly variable by species, with some species forming colonies consisting of ten or fewer individuals, while the largest maternity colony in the world in Bracken Cave is estimated to have over 15 million bats.

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References

  1. Barquez, R.; Diaz, M.; Samudio Jr, R.; Arroyo-Cabrales, J. (2016). "Myotis albescens". IUCN Red List of Threatened Species . 2016: e.T14140A22049892. doi: 10.2305/IUCN.UK.2016-1.RLTS.T14140A22049892.en . Retrieved 12 November 2021.
  2. Stadelmann, B.; et al. (2007). "Molecular phylogeny of New World Myotis (Chiroptera, Vespertilionidae) inferred from mitochondrial and nuclear DNA genes". Molecular Phylogenetics and Evolution. 43 (1): 32–48. doi:10.1016/j.ympev.2006.06.019. PMID   17049280.
  3. Lack, Justin B.; Roehrs, Zachary P.; Stanley, Craig E.; Ruedi, Manuel; Van Den Bussche, Ronald A. (2010). "Molecular phylogenetics of Myotis indicate familial-level divergence for the genus Cistugo (Chiroptera)". Journal of Mammalogy. 91 (4): 976–992. doi:10.1644/09-MAMM-A-192.1.
  4. López-González, C.; et al. (2001). "Taxonomic status of Myotis (Chiroptera: Vespertilionidae) in Paraguay". Journal of Mammalogy. 82 (1): 138–160. doi: 10.1644/1545-1542(2001)082<0138:TSOMCV>2.0.CO;2 .
  5. 1 2 3 4 5 6 7 8 9 Braun, J.; et al. (2009). "Myotis albescens (Chiroptera: Vespertilionidae)". Mammalian Species. 846: 1–9. doi: 10.1644/846.1 .
  6. 1 2 Simmons, N.B. & Voss, R.S. (1998). "The mammals of Paracou, French Guiana: a Neotropical lowland rainforest fauna. Part 1. Bats". Bulletin of the American Museum of Natural History. 237: 1–219. hdl:2246/1634.
  7. Simmons, N.B. (2005). "Order Chiroptera". In Wilson, D.E.; Reeder, D.M (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. pp. 312–529. ISBN   978-0-8018-8221-0. OCLC   62265494.
  8. Whitaker, J.O. & Findley, J.S. (1980). "Foods Eaten by Some Bats from Costa Rica and Panama". Journal of Mammalogy. 61 (3): 540–544. doi:10.2307/1379850. JSTOR   1379850.
  9. Aguirre, L.F. (2002). "Structure of a Neotropical savanna bat community". Journal of Mammalogy. 83 (3): 775–784. doi: 10.1644/1545-1542(2002)083<0775:SOANSB>2.0.CO;2 .
  10. Fenton, M.B. & Bogdanowicz, W. (2002). "Relationships between external morphology and foraging behaviour: bats in the genus Myotis". Canadian Journal of Zoology. 80 (6): 1004–1013. doi:10.1139/z02-083.
  11. Surlykke, A. & Valko E.K.V. (2008). "Echolocating bats cry out loud to detect their prey". PLOS ONE. 3 (4): e2306. Bibcode:2008PLoSO...3.2036S. doi: 10.1371/journal.pone.0002036 . PMC   2323577 . PMID   18446226.