Azores noctule

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Azores noctule
Nyctalus azoreum.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Chiroptera
Family: Vespertilionidae
Genus: Nyctalus
Species:
N. azoreum
Binomial name
Nyctalus azoreum
Thomas, 1901

The Azores noctule (Nyctalus azoreum) is a species of bat found in the dry forests of the Azores. It is the only species of mammal endemic to the Azores. It has been recorded on most of the islands of the Azores, and remains common on some but is rare on others. [2] Its numbers are threatened due to habitat loss caused by humans, and the remaining populations are quite fragmented. It is known to roost in hollowed-out trees, buildings, and caves.

The species is related to the widespread lesser noctule, and in the past was treated as a subspecies of that species. Genetic studies have found that it originated recently from lesser noctules which colonised the Azores, and has low levels of genetic divergence from its parent species. It nevertheless is much smaller than the lesser noctule and weighs less, has darker fur and has a different frequency of echolocation calls (about 4–5 Hz higher), and is usually treated as a separate species. [3]

As opposed to other bats, the Azores noctule exhibits an unusually high frequency of diurnal flight, frequently hunting insects by day, although it is still most active at night. [4] It has been hypothesised that the Azores noctules' diurnal foraging behaviour may be due to the absence of avian predators in the Azores. Azores noctules still seem to exhibit some anti-predator behaviour, such as leaving their roosting sites in groups, but this may be related to foraging behaviour or non-avian predators such as rats. [4]

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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".

<span class="mw-page-title-main">Horseshoe bat</span> Family of mammals

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

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<span class="mw-page-title-main">Common pipistrelle</span> Species of mammal

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

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

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<span class="mw-page-title-main">Lesser sac-winged bat</span> Species of bat in the family Emballonuridae

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

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

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

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

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<i>Nyctalus</i> Genus of bats

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References

  1. Russo, D.; Cistrone, L. (2023). "Nyctalus azoreum". IUCN Red List of Threatened Species . 2023: e.T14922A211008291. doi: 10.2305/IUCN.UK.2023-1.RLTS.T14922A211008291.en .
  2. Salgueiro, P; Coelho, MM; Palmeirim, JM; Ruedi, M; et al. (2004). "Mitochondrial DNA variation and population structure of the island endemic Azorean bat (Nyctalus azoreum)". Molecular Ecology. 13 (11): 3357–3366. doi:10.1111/j.1365-294X.2004.02354.x. PMID   15487995.
  3. Salgueiro, P; Ruedi, M; Coelho, MM; Palmeirim, JM (2006). "Genetic divergence and phylogeography in the genus Nyctalus (Mammalia, Chiroptera): implications for population history of the insular bat Nyctalus azoreum ". Genetica. 130 (2): 169–181. doi:10.1007/s10709-006-9004-x. PMID   16941086. S2CID   21604786.
  4. 1 2 Irwin N.R; Speakman J.R. (2003). "Azorean bats Nyctalus azoreum, cluster as they emerge from roosts, despite the lack of avian predators" (PDF). Acta Chiropterologica. 5 (2): 185–192. doi:10.3161/001.005.0203. S2CID   13673687. Archived from the original (PDF) on 2009-12-27.