Parnell's mustached bat

Parnell's mustached bat
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Chiroptera
Family: Mormoopidae
Genus: Pteronotus
Species:
P. parnellii
Binomial name
Pteronotus parnellii
Gray, 1843
Subspecies[2]

P. p. parnellii
P. p. fuscus
P. p. gonavensis
P. p. mesoamericanus
P. p. mexicanus
P. p. portoricensis
P. p. pusillus
P. p. rubiginosus

Parnell's mustached bat (Pteronotus parnellii) is an insectivorous bat native to the Americas. It ranges from southern Sonora, Mexico, south to Brazil. It has a wider historical range; fossil specimens have been collected on the island of New Providence in the Bahamas.

Illustration by George Henry Ford

The bat was named for the British zoologist Richard Parnell.[3]

Biology

This is a large bat with a forearm length of about 6 centimetres (2.4 in). The ears are short and pointed, and lack noseleafs. The lips are wrinkled up and modified into a funnel shape.

This bat is most common in moist habitat types, and it can be found in some dry deciduous forests. It is mostly nocturnal, roosting in caves and mines during the day and emerging shortly after sunset for five to seven hours of activity.[4]

Parnell's mustached bat is an insectivore, taking a variety of insects such as beetles, moths, flies, and dragonflies. While many insectivorous bats prefer river habitats for the availability of aquatic insects, it generally hunts in non-river habitats due to the availability of more nutritious food items. This comes with a greater energy cost, as such habitats typically have more foliage, requiring increased maneuverability.[5]

Females gather in warm caves with other species, including the Cuban flower bat (Phyllonycteris poeyi), during the breeding season. They give birth around July and nurse pups until around October. The pups only leave the safety of their birth cave to forage and hunt when their forearm length reaches adult size. In all species, the calls of newborn pups vary from those of mature bats. Typically the frequency of their calls increases with age.[6]

Echolocation

Parnell's mustached bat produces long constant frequency (CF) calls. These are mixed with brief frequency modulations (FM), and are harmonic, consisting of a second, more intense constant frequency of about 61 kHz. The bat adjusts the CF component of their calls so that their second harmonic echos are consistently received at around 61 kHz. The cochlea, and other components of the inner ear, are designed to receive frequencies approximating 61 kHz. The bat uses the long CF portion to evaluate relative motion, and the terminal downward FM to determine target distance. In addition to this sonar, the species has several other modes of communication. It is the only bat in the family Mormoopidae to have evolved Doppler-sensitive sonar due to the long CF call component.[6]

References

  1. ^ Solari, S. 2016. Pteronotus parnellii. The IUCN Red List of Threatened Species 2016. Retrieved 29 December 2017.
  2. ^ Pteronotus (Phyllodia) parnellii. Mammal Species of the World. Bucknell.edu. Retrieved 29 December 2012.
  3. ^ The Eponym Dictionary of Mammals
  4. ^ Bateman, Gary C.; Vaughan, Terry A. (30 March 1974). "Nightly Activities of Mormoopid Bats". Journal of Mammalogy. 55 (1): 45–65. doi:10.2307/1379256. ISSN 0022-2372. JSTOR 1379256.
  5. ^ Oliveira, Leonardo Queiroz de; Marciente, Rodrigo; Magnusson, William E.; Bobrowiec, Paulo Estefano D. (29 September 2015). "Activity of the Insectivorous Bat Pteronotus parnellii Relative to Insect Resources and Vegetation Structure" (PDF). Journal of Mammalogy. 96 (5): 1036–1044. doi:10.1093/jmammal/gyv108. ISSN 0022-2372.
  6. ^ a b Vater, M., et al. 2003. Development of echolocation calls in the mustached bat, Pteronotus parnellii. Journal of Neurophysiology 90(4) 2274-90.

Further reading

  • Buden, Donald W. (1986). "Distribution of Mammals of the Bahamas". Florida Field Naturalist. 14 (3): 53–84.

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