Fawn leaf-nosed bat

The fawn leaf-nosed bat – Hipposideros cervinus – is a species of bat in the family Hipposideridae found in Australia, Indonesia, Malaysia, the Philippines and Vanuatu.

Fawn leaf-nosed bat
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Chiroptera
Family: Hipposideridae
Genus: Hipposideros
Species:
H. cervinus
Binomial name
Hipposideros cervinus
(Gould, 1854)[1]
Fawn roundleaf bat range

Taxonomy

A species first described by John Gould in his Mammals of Australia (1854), the author assigning it to the genus Rhinolophus with some hesitation.[1] The specimens referred to by Gould and subsequent authors were obtained at Cape York peninsula and Albany Island (Pabaju) at the northeast of Australia.[2] A taxonomic treatment in a new generic combination, as a subspecies of Hipposideros galeritus, was published in a revision of the genus a century later by J. E. Hill, part of his extensive work on the systematics of the order Chiroptera.[3] The species-complex of H. galeritus and other Australopapuan taxa of Hipposideros was again reviewed by Hill and Paulina D. Jenkins in 1981, attempting to resolve what emerged as polyphyletic descriptions. These authors published a new diagnosis of the population and re-elevated the name to species status as Hipposideros cervinus.[2] Geographic variation within this hipposiderid species has been noticed but not surveyed. and it is suggested that a revision of unrecognised diversity within the species may alter the taxonomic status of the population.[4]

A common name in Australia is fawn leaf-nosed bat,[5] and it is also referred to as the fawn roundleaf bat, fawn-colored leaf-nosed bat, fawn horseshoe-bat, fawn leaf-nosed bat and Gould's leaf-nosed bat.[4]

A subspecific arrangement citing the works of Hill and Jenkins, and later treatments published the New Guinea authority Tim Flannery and others, is recognised as four subspecies by ITIS. The nominate subspecies describes the types obtained in Australia by Gould, and described subspecies may be summarised as,[6]

  • Hipposideros cervinus
  • Hipposideros cervinus batchianus Matschie, 1901
  • Hipposideros cervinus cervinus (Gould, 1854)
  • Hipposideros cervinus labuanensis (Tomes, 1859)
  • Hipposideros cervinus misorensis (Peters, 1906)

Description

Hipposideros cervinus is a medium-sized hipposiderid with two lateral leaflets on its nose leaf.[7] Noseleaf is greyish pink, ears triangular.[8] Pups are dark gray in coloration, maturing to a dark brown in adults which often becomes bleached over time, turning a bright orange colour due to the ammonia from droppings in communal roosts.

The nose-leaf distinguishes the species by its squarish outline which is broader at the lower part, below the nostrils, where small leaflets extend from either side of this structure. The funnel shaped ear becomes pointed at the tip. The colour of the pelage is variable, appearing as a uniform grey to russet highlights over a more greyish brown shade and sometimes presenting as a bright orange colour. The range of measurements describing Hipposideros cervinus for the forearm are 45–48 millimetres, the combined head and body length 41–51 mm, ear length from the tip to the notch at base 13–15 mm. The average mass, derived from a range of 5.6 to 8.5 grams, is 7.0 grams.[9]

Distribution

Hipposideros cervinus is widespread in a region extending from the Malay Peninsula and on larger and smaller islands in the territories of Indonesia and New Guinea. The species occurs at altitudes from sea level up to 1400 metres asl.[4] The distribution range includes the Torres Strait island to the northeast of Australia and extends to a few records on the mainland, east of Cape York and near the town of Coen, Queensland.[9]

Ecology and behaviour
Illustration of Rhinolophus cervinus by Henry Richter in Mammals of Australia (Gould, 1863), the Australian subspecies Hipposideros cervinus cervinus.

A communal rooster, is commonly found roosting in caves and trees. In 1958 Medway estimated the Niah population to be 250,000.

Hipposideros cervinus is recorded roosting at caves and abandoned mines in groups of individuals that suspend themselves separately, rather than huddling together, and are found cohabiting with other species of hipposiderid bats.[10] They forage in a variety of habitat, from dense rainforest to open woodland in savannah landscapes. Their prey are mid-sized insects caught in flight close to low vegetation, over water and near to the ground.[9] They fly at slow speed and with a high degree of manoeuvrability while foraging for invertebrates such as beetles and moths, allowing them to hunt at low altitudes and make sudden changes in direction to catch its prey. H. cervinus are recorded as hunting in small groups,[10]

Reproduction is a single birth during November to December.[9] Juveniles attach themselves to their mother by clasping her ventral side with their head facing away, maintaining this position whether she is at the roost or in flight, but turn in the other direction to receive food from their mother.[10]

Conservation

The IUCN Red List assessed the conservation status as least concern in 2008, noting a presumably large and widespread population that is tolerant of some ecological alterations to its environment. Hipposideros cervinus is assumed to be vulnerable to the large scale clearing of forest in the region, although the population trend is unknown.[4] A regional assessment of H. cervinus in the Australian state of Queensland listed the species as vulnerable to extinction.[11] It was previously found in Singapore, but may have become extinct there.[4]

gollark: Apioform #26 is free.
gollark: It's already too late.
gollark: Oh, but you're fine, of course.
gollark: You can infer context fine, not that it needs much, and I actually sometimes scroll.
gollark: You should IMMEDIATELY undergo sleep.

References
  1. Gould, J.; Richter, H. (1863). The mammals of Australia. 3. Printed by Taylor and Francis, pub. by the author. pp. pl.34 et seq.
  2. Jenkins, P.D.; Hill, J.E. (1981). "The status of Hipposideros galeritus Cantor, 1846 and Hipposideros cervinus (Gould, 1854) (Chiroptera: Hipposideridae)". Bulletin of the British Museum (Natural History). 41: 279–294.
  3. Hill, J.E. (1963). "A revision of the genus Hipposideros". Bulletin of the British Museum (Natural History). 11: 1–129. doi:10.5962/bhl.part.4716.
  4. Csorba, G.; Bumrungsri, S.; Francis, C.; Bates, P.; Gumal, M.; Hall, L.; Bonaccorso, F. (2008). "Hipposideros cervinus". The IUCN Red List of Threatened Species. IUCN. 2008: e.T10118A3167457. doi:10.2305/IUCN.UK.2008.RLTS.T10118A3167457.en.
  5. Van Dyke, S. and Strahan, R. (eds.) (2008) The Mammals of Australia, Third Edition, New Holland / Queensland Museum, Brisbane ISBN 978-1-877069-25-3
  6. "Hipposideros cervinus (Gould, 1854)". Integrated Taxonomic Information System. Retrieved 6 June 2019.
  7. Phillips, Quentin and Phillips, Karen (2016). Mammals of Borneo and their Ecology. ISBN 9789838121668
  8. Payne, Junaidi and Francis, Charles (1985). A Field Guide to the Mammals of Borneo. ISBN 9679994716
  9. Menkhorst, P.W.; Knight, F. (2011). A field guide to the mammals of Australia (3rd ed.). Melbourne: Oxford University Press. p. 148. ISBN 9780195573954.
  10. "Fawn Leaf-nosed Bat". Australian bat fact sheet. The Australian Museum. November 2019. Retrieved 7 June 2019.
  11. "Hipposideros cervinus : Fawn Leafnosed-Bat". Atlas of Living Australia. Retrieved 7 June 2019.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.