Northern freetail bat

Northern freetail bat
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Chiroptera
Family: Molossidae
Genus: Mops
Species:
M. jobensis
Binomial name
Mops jobensis
(Miller, 1902)
Synonyms

Nyctinomus jobensis
N. plicatus
Tadarida jobensis

The northern freetail bat (Mops jobensis) is a species of bat found in Yapen, Seram Island, Western New Guinea and Northern Australia.

Taxonomy and etymology

It was described as a new species in 1902 by American zoologist Gerrit Smith Miller Jr. Miller placed it in the now-defunct genus Nyctinomus, naming it Nyctinomus jobensis.[2] Miller likely chose the species name "jobensis" because the holotype was discovered on Jobie Island near the community of Ansus. The holotype was collected by Italian naturalist Odoardo Beccari.[2]

Description

It has been described as having "features reminiscent of Darth Vader."[3] From head to tail, it is approximately 98 mm (3.9 in) long. Its head and body is 80–90 mm (3.1–3.5 in) long, and its tail is 35–45 mm (1.4–1.8 in) long. Its forearm is 46–52 mm (1.8–2.0 in) long. It weighs 20–30 g (0.71–1.06 oz).[3]

Biology and behavior

They will fly and forage in groups of two or more individuals. Its foraging style utilizes fast, direct flight suited for open areas or above canopies. It is insectivorous, consuming beetles, bugs, moths, lacewings, grasshoppers, cockroaches, flies and leafhoppers.[3] It is one of the only species of bat in Australia that can be heard when foraging. Its typical echolocation frequency is relatively low (16-25kHz), overlapping with the upper range of sounds audible to humans. Lower frequency sounds down to below 10kHz have been recorded, with speculation that these are more likely to relate to social calls.[3][4][5][6] It is nocturnal, roosting in sheltered places during the day such as tree hollows or caves. These roosts can consist of many individuals, as it is a colonial species.[3]

Range and habitat

It prefers to forage in the tropical savannas of Northern Australia. It is also found in urban areas, using artificial lights to forage for the insects attracted to them.[3]

Conservation

It is currently evaluated as least concern by the IUCN—its lowest conservation priority. It meets the criteria for this assessment because it has a large geographic range, a large population, it occurs in protected areas, and it tolerates human modification of landscapes. Its population trend is stable.[1]

References

  1. ^ a b Armstrong, K.N. (2021) [amended version of 2019 assessment]. "Chaerephon jobensis". IUCN Red List of Threatened Species. 2021: e.T4312A209520861. doi:10.2305/IUCN.UK.2021-3.RLTS.T4312A209520861.en.
  2. ^ a b Miller, G. S. (1902). "Two new tropical Old World bats". Proceedings of the Biological Society of Washington. 15: 246.
  3. ^ a b c d e f Kutt, A. S.; Milne, D. J.; Richards, G. C. (2008). "Northern Freetail-bat Chaerephon jobensis". In Van Dyck, S.; Strahan, R. (eds.). The Mammals of Australia. Reed New Holland. pp. 485–486.
  4. ^ Wilson, Don E.; Mittermeier, Russell A., eds. (2019). "Molossidae". Handbook of the Mammals of the World. Vol. 9. Barcelona: Lynx Edicions. pp. 598–672. ISBN 978-84-16728-19-0.
  5. ^ Milne, Damian J. (May 2002). Key to the bat calls of the Top End of the Northern Territory (PDF) (Technical report). Parks and Wildlife Commission of the Northern Territory. 71.
  6. ^ Armstrong, Kyle N (November 2003). "Possible social calls of the Northern Freetail Bat Chaerephon jobensis in the Pilbara region of Western Australia" (PDF). The Australasian Bat Society Newsletter (21): 29–32. Retrieved 8 November 2022.