Schlieffen's bat

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Schlieffen's bat
Naturalis Biodiversity Center - ZMA.MAM.1960.b dor - Nycticeius schlieffeni - skin.jpeg
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Chiroptera
Family: Vespertilionidae
Genus: Nycticeinops
Hill and Harrison, 1987
Species:
N. schlieffeni
Binomial name
Nycticeinops schlieffeni
Peters, 1859
Synonyms

Nycticeius schlieffeni (Peters, 1859)
Scoteinus schlieffeni (Peters, 1859)

Contents

Schlieffen's bat or Schlieffen's twilight bat (Nycticeinops schlieffeni) is a species of vesper bat found in Africa. It has been placed in numerous genera since its first description in 1859, but morphological and genetic studies have confirmed it as the only species in the genus Nycticeinops. [2] [3] It is named for the collector of the original specimen, Wilhelm von Schlieffen-Schlieffiennburg. [4]

Description

Schlieffen's bat is an unusually small bat, measuring 4 to 5 centimetres (1.6 to 2.0 in) in head-body length, and weighing only 3.7 to 5 grams (0.13 to 0.18 oz). Although there is some variation on coat colour across its range, in general, the bat is brown with pale grey or white underparts. It has a broad, flattened skull, with a short, wide, sparsely haired snout. The ears are rounded, with a blunt, convex, tragus. There is a prominent calcar extending about half the way along the uropatagial border, and a proportionately long tail of approximately 3 centimetres (1.2 in). [4]

In many respects, Schlieffen's bats resemble the more familiar evening bats of North America; they can most readily be distinguished by the shorter snout, and by the detailed shape of the baculum. [4]

Distribution and subspecies

Schlieffen's bat is found widely across Africa outside the equatorial rainforest. It inhabits a broad band of territory from Mauritania and Senegal in the west across to Namibia, South Africa, Angola and Mozambique in Southern Africa, to Kenya and Tanzania in the African Great Lakes region, to Ethiopia, Somalia, Djibouti and Eritrea in the Horn of Africa, to Sudan and Egypt in the Nile Valley. It is also found in the south-western Arabian peninsula. [4]

Several subspecies of Schlieffen's bat have been identified. However, there has been little agreement on their status or range. The most recent analysis, as reported in the 2005 edition of Mammal Species of the World , concluded that there is insufficient evidence for the retention of any of these subspecies, and Schlieffen's bat should therefore be considered monotypic. [5]

Behaviour and biology

Schlieffen's bats forage over fresh water, such as marshes, rivers, and lakes, and are found in a wide range of riparian forest and savannah environments. Like many bats, they are nocturnal, and they spend the day roosting in crevices in rocks and trees, and may take up residence in man-made buildings or cellars. They appear to be generally solitary, but may roost in small groups of three or so individuals. [4]

The echolocation calls of Schlieffen's bats have been reported to be narrow band with steep frequency modulation, and to range from 39 to 47 kHz. They feed primarily on beetles and caddisflies, and a smaller proportion of moths, bugs, and flies. [6] Their predators are known to include bat hawks. [7]

Schlieffen's bats mate in June, but carry the sperm in their uterus until August, when ovulation and fertilisation occur. [8] They typically give birth to a litter of three young. [9]

Related Research Articles

Vespertilionidae 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".

Bulldog bat Family of bats

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, as well as at least one fossil species, Noctilio lacrimaelunaris, from the Miocene of Argentina. The naked bulldog bat does not belong to this family, but to the family Molossidae, the free-tailed bats. They are found near water, from Mexico to Argentina and also in the Caribbean islands. In these areas they can be found roosting in groups within hollow trees, caves, man made homes, or other openings with enough space. 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.

Common vampire bat Species of bat

The common vampire bat is a small, leaf-nosed bat native to Latin America. 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.

Jamaican fruit bat 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.

Pallid bat 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.

Northern ghost bat Species of bat

The northern ghost bat is a bat species from South America, Trinidad, and Central America. It is a relatively rare, completely white, insectivorous bat, with an unusual sac at the base of its tail.

Bonda mastiff bat Species of bat

The Bonda mastiff bat or Thomas's mastiff bat, is a species of mastiff bat from South and Central America. It is named for the town of Bonda, near Santa Marta in Colombia.

Geoffroys tailless bat Species of bat

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

Little yellow-shouldered bat Species of bat

The little yellow-shouldered bat is a bat species from South and Central America. This species is a frugivore and an effective seed disperser. It roosts alone in tree cavities, on branches, vines, and under palm leaves, usually keeping to the same roosts day to day. There is evidence to suggest hypothermia is a thermoregulatory strategy to help adjust metabolic levels. In terms of mating, ambient temperature has been noted as a greater influence as compared to food availability. Its wing shape can also be affected by pregnancy in order to make flight more efficient.

Evening bat Species of bat

The evening bat is a species of bat in the vesper bat family that is native to North America. Hunting at night, they eat beetles, moths, and other flying insects.

Large slit-faced bat Species of bat

The large slit-faced bat, Nycteris grandis, is a species of slit-faced bat with a broad distribution in forest and savanna habitats in West, Central, and East Africa. N. marica, is the available name for the southern savanna species if it is recognized as distinct from this species.

Egyptian slit-faced bat Species of mammal

The Egyptian slit-faced bat is a species of slit-faced bat broadly distributed throughout Africa and the Middle East. It is a species of microbat in the family Nycteridae. Six subspecies are known.

Lesser bamboo bat 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.

Flat-faced fruit-eating bat 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.

Ansorges free-tailed bat Species of bat

Ansorge's free-tailed bat is a species of bat in the family Molossidae native to sub-Saharan Africa. It is named for W.J. Ansorge, who collected the first formally described specimen.

Wahlbergs epauletted fruit bat Species of bat

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

Sundevalls roundleaf bat Species of bat

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

Swinnys horseshoe bat Species of bat

Swinny's horseshoe bat is a species of bat in the family Rhinolophidae. In English, R. swinnyi is commonly referred to as Swinny's horseshoe bat. In Afrikaans, it is commonly referred to as Swinny se saalneusvlermuis. This species belongs to the African clade. R. swinnyi was discovered by an African collector H. H. Swinny. They have been recorded in Angola, Republic of the Congo, Mozambique, South Africa, Tanzania, Zambia, Zimbabwe, and Malawi.

Cinnamon red bat 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).

References

  1. Jacobs, D.; Cotterill, F.P.D.; Taylor, P.J. & Monadjem, A. (2008). "Nycticeinops schlieffeni". IUCN Red List of Threatened Species . 2008. Retrieved 14 Jul 2012.
  2. Hill, J.E. & Harrison, D.L. (1987). "The baculum in the Vespertilioninae (Chiroptera: Vespertilioninae) with a systematic review. A synopsis of Pipistrellus and Eptesicus, and the descriptions of a new genus and subgenus". Bulletin of the British Museum (Natural History), Zoology. 52 (7): 225–305.
  3. Ruedas, L.A.; et al. (1990). "Chromosomes of five species of vespertilionid bats from Africa". Journal of Mammalogy. 71 (1): 94–100. doi:10.2307/1381324. JSTOR   1381324.
  4. 1 2 3 4 5 Johnston, D.S. (2006). "Nycticeinops schlieffeni". Mammalian Species. 798: Number 798: pp. 1–4. doi: 10.1644/798.1 .
  5. 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.
  6. Fenton, M.B. & Thomas, M.W. (1980). "Dry-season overlap in activity patterns, habitat use and prey selection by sympatric African insectivorous bats". Biotropica. 12 (2): 81–90. doi:10.2307/2387723. JSTOR   2387723.
  7. Fenton, M.B.; et al. (1977). "Activity patterns, habitat use, and prey selection by some African insectivorous bats". Biotropica. 9 (2): 73–85. doi:10.2307/2387662. JSTOR   2387662.
  8. van der Merwe, M. & Rautenbach, I.L. (1987). "Reproduction in Schlieffen's bat, Nycticeius schlieffenii, in the eastern Transvaal lowveld, South Africa". Journal of Reproduction and Fertility. 81 (1): 41–50. doi: 10.1530/jrf.0.0810041 . PMID   3668959.
  9. van der Merwe, M. & Rautenbach, I.L. (1986). "Multiple births in Schlieffen's bat, Nycticeius schlieffenii (Peters, 1859) (Chiroptera: Vespertilionidae) from the southern African subregion". 1986. 21 (1): 48–50. hdl:10499/AJ19416.