Lesser noctule
{{Short description|Species of bat}}
{{Use dmy dates|date=June 2022}}
{{Speciesbox
| status = LC | status_system = IUCN3.1
| image = Nyctalus leisleri.jpg
| genus = Nyctalus
| species = leisleri
| authority = (Kuhl, 1817)
| range_map = Mapa Nyctalus leisleri.png
}}
The lesser noctule, Leisler's bat or the Irish bat (Nyctalus leisleri),{{cite web|title=High temperatures send bats swooping in|url=https://www.irishexaminer.com/breakingnews/lifestyle/features/high-temperatures-send-bats-swooping-in-852307.html|author=The Irish Examiner|date=2 July 2018}}{{cite web|title=Seasonal changes in the foraging behaviour of Leisler's bats (Nyctalus leisleri) in Ireland as revealed by radio-telemetry|url=https://www.researchgate.net/publication/230085642|author=Shiel et al (1999)}} is a species of insectivorous bat belonging to the vesper bat family, Vespertilionidae. The species was named to honour the naturalist Johann Philipp Achilles Leisler.
Description
It is a medium-sized bat, slightly smaller than the common noctule. It has a length of 48 to 68 mm (head and body) and a wingspan of 260 to 330 mm. The forearm measures 38 to 47 mm and the bat's weight is 11 to 20 grams. The face, ears and wings are dark. The fur is brown, darker at the base than the tip unlike that of the common noctule which is the same colour along its length. The undersides of the arms are hairy giving it the alternative name "hairy-armed bat". The ears are short and rounded with a mushroom-shaped tragus. The wings are long and narrow.[http://batslife.eu/item/nyctalus-leisleri/ Nyctalus leisleri – Science for Nature Foundation]
Distribution
The lesser noctule is found locally across Europe and western Asia, eastwards as far as the Urals and Himalayas. It is also found in north-west Africa, the Canary Islands and Madeira. The form in the Azores is often considered to be a separate species – Azores noctule (Nyctalus azoreum).
It is typically found in forests, both coniferous and deciduous, but has also adapted to parkland and urban areas and frequently roosts in buildings.
In most parts of its range the lesser noctule is rare, however in Ireland it is much more common, being the island’s largest and third most common bat species. Due to the lesser noctule's ubiquity in Ireland, the island is also considered its global stronghold.{{cite web|title=Ireland a Leisler's Bat stronghold|url=https://www.independent.ie/regionals/goreyguardian/lifestyle/ireland-a-leislers-bat-stronghold-29388124.html|author=The Irish Independent}} In Britain it is known from a few colonies in England and Wales with occasional wanderers reaching Scotland. Threats to its survival include declines in large insects, loss of forest and hollow trees and toxic chemicals found in treated timber in buildings.
Feeding
File:vesperugo leisleri ras.jpg
The bats emerge soon after sunset to feed on flying insects such as moths and beetles. They fly straight and fast with shallow dives, often at treetop level. They sometimes feed around streetlights, catching the insects attracted to them. They are most active around dusk and dawn and will travel up to 10 km while foraging.
Reproduction
Lesser noctules usually breed in small colonies of around 20 to 50 individuals but in Ireland they can be much larger, with some colonies numbering as many as 1,000 individuals.{{cite web|title=Leisler's bat|url=https://cdn.bats.org.uk/pdf/About%20Bats/leislers_11.02.13.pdf?mtime=20181101151300|author=Bat Conservation Trust|access-date=15 February 2020|archive-date=4 August 2021|archive-url=https://web.archive.org/web/20210804052009/https://cdn.bats.org.uk/pdf/About%20Bats/leislers_11.02.13.pdf?mtime=20181101151300|url-status=dead}} The colony is usually in a hollow tree or building; bat boxes may sometimes be used. The females give birth to one or two young, with twins being more common in the eastern part of the range.
Echolocation
The frequencies used by this bat species for echolocation lie between 25 and 54 kHz, have most energy at 29 kHz and have an average duration of 8.5 ms.Parsons, S. and Jones, G. (2000) 'Acoustic identification of twelve species of echolocating bat by discriminant function analysis and artificial neural networks.' J Exp Biol., 203: 2641-2656.Obrist, M.K., Boesch, R. and Flückiger, P.F. (2004) 'Variability in echolocation call design of 26 Swiss bat species: Consequences, limits and options for automated field identification with a synergic pattern recognition approach.' Mammalia., 68 (4): 307-32.
Cultural references
An image of the bat is one of the security features of the 2020 £20 banknote of the Ulster Bank of Northern Ireland.{{Cite news|url=https://www.belfasttelegraph.co.uk/business/northern-ireland/new-ulster-bank-20-bank-note-has-skeleton-and-bat-security-features-39632163.html|title = New Ulster Bank £20 bank note has 'skeleton and bat' security features|newspaper = Belfasttelegraph}}
References
{{Reflist}}
Further reading
- Frank Greenaway & A. M. Hudson (1990) A Field Guide to British Bats, Bruce Coleman Books, Uxbridge
- Wilfried Schober & Eckard Grimmberger (1993) Hamlyn Guide: Bats of Britain and Europe, Hamlyn, London.
- R. E. Stebbings & Francesca Griffith (1986) Distribution and Status of Bats in Europe, Institute of Terrestrial Ecology, Huntingdon.
- S. Zera & P. Myers (2004) [http://animaldiversity.ummz.umich.edu/site/accounts/information/Nyctalus_leisleri.html Nyctalus leisleri], Animal Diversity Web. Retrieved 5 December 2006.
External links
{{Wikispecies|Nyctalus leisleri}}
- [https://web.archive.org/web/20080327061207/http://www.arkive.org/species/ARK/mammals/Nyctalus_leisleri/ ARKive] Photographs
- [http://www.forestry.gov.uk/forestry/INFD-6K3CXY Woodland Management For Bats Guide] {{Webarchive|url=https://web.archive.org/web/20130319132917/http://www.forestry.gov.uk/forestry/INFD-6K3CXY |date=19 March 2013 }}
{{Vespertilionidae|V.|P.}}
{{Taxonbar|from=Q287105}}
{{Authority control}}
Category:Mammals described in 1817
Category:Mammals of Central Asia
Category:Mammals of Azerbaijan