Little big-eared bat

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Little big-eared bat
Micronycteris megalotis (Little big-eared bat) by Merlin Tuttle.jpg
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Chiroptera
Family: Phyllostomidae
Genus: Micronycteris
Species:
M. megalotis
Binomial name
Micronycteris megalotis
Gray, 1842
Distribution of Micronycteris megalotis.png
Distribution

The little big-eared bat (Micronycteris megalotis) is a bat species in the order Chiroptera and family Phyllostomidae. [2] 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). [3]

Contents

Description

Micronycteris megalotis is considered a small bat for its genus, although the size varies slightly depending on geographical location. [2] It has large ears which are characteristic of its species. [2] It has a large nose pad that is generally twice as high as it is wide. [2] The head is elongated and eyes are small and black. [2] M. megalotis has short wings that are wide and are relatively short. [2] The wings are attached to the feet, which are long and slender. [2] Their short and wide wings allow for better maneuverability in their habitat.

M. megalotis has brown fur with white spots on its underbelly. [2] Color may vary though depending on the geographical region. [2] In juveniles, fur is slightly shorter in length (7 mm). [4] The fringe of fur on the inner border of the ear is dense and variable in length (3–6 mm), and also varies with the age of the bat. [4] M. megalotis has a small and slender skull, with a high forehead. [2] Teeth are relatively primitive; the upper incisors are large while the outer incisors are small. [2] The upper canines are heavy and dissimilar. [2] Premolars are approximately the same size and molars have W-shaped lophs.

Diet

The little big-eared bat feeds mostly on insects and possibly fruit, currently there is not enough data to determine if this species eats a large amount of fruit or to pinpoint what kind of fruit it eats. [5] Small beetles make up the majority of this bat’s diet, with grasshoppers, crickets, cockroaches, and katydids coming in second. [2] [5] [6] [7] Diet of these bats may depend on the season. [5] Diet may also depend on the foraging habitat, but it usually eats noisy insects. [7] M. megalotis is an opportunistic feeder. Its stomach is relatively simple. [2] M. megalotis may alternate its diet between insects, fruit, nectar, and pollen, consuming the latter when insect populations are low. [6] M. megalotis is slow-flying and highly maneuverable and is also able to hover. [2] Although their food is mainly composed of flying insects and caught mid-flight, it can also find food while perched on vegetation. [2]

Ecology

M. megalotis is widely distributed and can be found in many habitats including wet and dry areas, evergreen and deciduous forests, swamps, and clearings. [2] These bats occur throughout South America, Central America, and Mexico. [4] In its genus, Micronycteris , M. megalotis is thought to be the most widely distributed. [4] They occupy small caverns, crevices of rocky outcrops, spaces under bridges, tunnels, buildings, and houses. [2] At lower elevations, these bats may roost in hollow trees and logs. [2]

Currently, there are no records of causes of mortality. [2] It is speculated that habitat destruction may be a major concern for these bats, but there is no evidence for this. [2]

Related Research Articles

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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">Jamaican fruit bat</span> Species of bat

The Jamaican, common or Mexican fruit bat is a fruit-eating bat native to Mexico, through Central America to northwestern South America, as well as the Greater and many of the Lesser Antilles. It is also an uncommon resident of the Southern Bahamas. Populations east of the Andes in South America are now usually regarded a separate species, the flat-faced fruit-eating bat. The distinctive features of the Jamaican fruit bat include the absence of an external tail and a minimal, U-shaped interfemoral membrane.

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

The big-eared woolly bat or (Peters's) woolly false vampire bat is a species of bat, belonging to the family Phyllostomidae.

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

Geoffroy's tailless bat is a species of phyllostomid bat from the American tropics.

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

The Brazilian big-eyed bat is a species of phyllostomid bat from South America. The scientific name honours Italian naturalist Giacomo Doria.

<span class="mw-page-title-main">White-throated round-eared bat</span> Species of bat

The white-throated round-eared bat is a bat species found from Honduras to Bolivia, Paraguay and Brazil. It creates roosts inside the nests of the termite, Nasutitermes corniger. It thrives on a mainly insect-based diet, focusing on the surfaces of foliage to hunt, and also eats fruit and pollen. It has a very wide range and is a common species over much of that range, so the International Union for Conservation of Nature has assessed its conservation status as being of "least concern".

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

The long-legged bat is a member of the Phyllostomidae family in the order Chiroptera. Both males and females of this species are generally small, with wingspans reaching 80mm with an average weight ranging between 6 and 9 grams. The facial structure of these bats includes a shortened rostrum with a prominent noseleaf. The most defining feature of these bats however, is their long posterior limbs that extend farther than most Phyllostomidae bats. At the ends of these hind legs, the long-legged bat has abnormally large feet equipped with strong claws.

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

The Ipanema bat is a bat species of order Chiroptera and family Phyllostomidae. It is found in northern Argentina, Bolivia, southeastern Brazil and Paraguay. It is the only species within its genus.

<span class="mw-page-title-main">Bidentate yellow-eared bat</span> Species of bat in the family Phyllostomidae

The bidentate yellow-eared bat is a species of bat in the family Phyllostomidae, native to South America. Formerly classified in the Vampyressa genus, phylogenetic analyses support its inclusion in Vampyriscus.

<i>Micronycteris</i> Genus of bats

Micronycteris is a genus of leaf-nosed bats.

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

The Jamaican fig-eating bat is a species of bat in the family Phyllostomidae. It is the only living species in the genus Ariteus. The scientific name translates as "yellowish and warlike". There are no recognised subspecies.

<span class="mw-page-title-main">Fraternal fruit-eating bat</span> Species of bat from South America

The fraternal fruit-eating bat is a species of bat in the family Phyllostomidae that is found in drier habitats in Ecuador and Peru. It was formerly considered to be a subspecies of the Jamaican fruit bat, but was raised to species level in 1978. The smallest species in the group of large Artibeus, it has a forearm length of 52–59 mm (2.0–2.3 in), a total length of 64–76 mm (2.5–3.0 in), and a weight of 30–55 g (1.1–1.9 oz).

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

The flat-faced fruit-eating bat is a South American species of bat in the family Phyllostomidae. It is sometimes considered a subspecies of the Jamaican fruit bat, but can be distinguished by its larger size, the presence of faint stripes on the face, and of a third molar tooth on each side of the upper jaw. Genetic analysis has also shown that the two species may not be closely related.

<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">Blunt-eared bat</span> Species of bat

The blunt-eared bat or Peruvian crevice-dwelling bat is a species of bat in the family Molossidae. It is monotypic within the genus Tomopeas and subfamily Tomopeatinae. It is endemic to Peru, where it is considered critically endangered. It is threatened by habitat loss.

Rosenberg's fruit-eating bat is a species of bat in the family Phyllostomidae. It is found in humid tropical forests in the El Chocó region on the coast of western Colombia and northwestern Ecuador at altitudes below 500 m. Until recently it was included within D. glauca, a canopy frugivore that also eats insects. It was elevated to full species status in 2009. The specific name is in honor of collector W. F. H. Rosenberg. The species is regarded as common, but is likely threatened by the deforestation of its habitat.

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

Benkeith's short-tailed bat is a leaf-nosed bat species found in Peru, Bolivia, and Brazil. It very closely resembles the chestnut short-tailed bat, and the two species are likely often confused.

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

Yates's big-eared bat is a species of leaf-nosed bat found in Bolivia.

References

[2] [4] [5] [6] [7]

  1. Solari, S. (2015). "Micronycteris megalotis". IUCN Red List of Threatened Species . 2015: e.T13379A22125168. doi: 10.2305/IUCN.UK.2015-4.RLTS.T13379A22125168.en . Retrieved 25 September 2021.
  2. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Alonso-Mejía, A. & Medellín, R.A. 1991. Micronycteris megalotis. Mammalian Species. 376:1-6.
  3. Eisenberg, John F.; Redford, Kent H. (2000). Mammals of the Neotropics, Volume 3: Ecuador, Bolivia, Brazil. University of Chicago Press. p. 142. ISBN   978-0226195421 . Retrieved August 19, 2015.
  4. 1 2 3 4 5 Larsen, Peter A.; Siles, Lizette; Pedersen, Scott C.; Kwiecinski, Gary G. (2011-11-01). "A new species of Micronycteris (Chiroptera: Phyllostomidae) from Saint Vincent, Lesser Antilles". Mammalian Biology - Zeitschrift für Säugetierkunde. 76 (6): 687–700. doi:10.1016/j.mambio.2011.01.006.
  5. 1 2 3 4 LaVal, Richard K.; LaVal, Margaret L. (1980-01-01). "Prey Selection by a Neotropical Foliage-Gleaning Bat, Micronycteris megalotis". Journal of Mammalogy. 61 (2): 327–330. doi:10.2307/1380057. JSTOR   1380057.
  6. 1 2 3 Whitaker, John O.; Findley, James S. (1980-01-01). "Foods Eaten by Some Bats from Costa Rica and Panama". Journal of Mammalogy. 61 (3): 540–544. doi:10.2307/1379850. JSTOR   1379850.
  7. 1 2 3 Lasso, David; Jarrín-V, Pablo (2005). "Diet variability of Micronycteris megalotis in pristine and disturbed habitats of Northwestern Ecuador". Acta Chiropterologica. 7 (1): 121–130. doi:10.3161/1733-5329(2005)7[121:dvommi]2.0.co;2. S2CID   84701400.