|Pallid Bat range|
The pallid bat (Antrozous pallidus) is a species of bat that ranges from western Canada to central Mexico. It is the sole species of its genus and is closely related to Van Gelder's bat (Bauerus dubiaquercus), which is sometimes included in Antrozous. Although it has in the past been placed in its own subfamily (Antrozoinae) or even family (Antrozoidae), it is now considered part of the subfamily Vespertilioninae and the tribe Antrozoini.
Pallid bats have larger eyes than most other species of bats in North America and have pale, long, and wide ears; their fur is generally lightly colored. They have on average a total length of 92 to 135 mm (3.6 to 5.3 in). Pallid bats are typically found in arid or semi-arid habitats.
Pallid bats are insectivores that feed on arthropods such as crickets and scorpions, and are capable of consuming up to half their weight in arthropods every night. Pallid bats are gleaners, which means that they normally catch their prey on the ground. However, they usually transport their prey to their night roost to eat it. When foraging, pallid bats typically fly at low heights of 1–2 m off the ground.
The mating season ranges from October to February. The female bat gives birth to twins during early June; they weigh about 3 to 3.5 g (0.11 to 0.12 oz) at birth and in four or five weeks are capable of making short flights. They do not attain adult size until about eight weeks of age, and do not become sexually mature until after around two years.
Like the majority of bat species, pallid bats are capable of using echolocation while foraging and traveling from their roost sites to foraging grounds. However, they may also opt to not echolocate while foraging, and instead use their large ears to locate insects on the ground.
Pallid bats are a unique type of bat because they are heterothermic, which means, depending on the time of year, they can be either poikilothermic or homoeothermic. They have the ability to control their body temperature and equilibrate it with the environment during winter hibernation and whenever they rest.
They primarily sleep in rock crevices and buildings. Pallid bats are skilled at climbing and crawling.
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- Roehrs, Z.P.; Lack, J.B.; Van Den Bussche, R.A. (2010). "Tribal phylogenetic relationships within Vespertilioninae (Chiroptera: Vespertilionidae) based on mitochondrial and nuclear sequence data". Journal of Mammalogy 91 (5): 1073–1092. doi:10.1644/09-MAMM-A-325.1.
- Cunningham,Eric. "About Bats & Blood." http://ebat.tamu.edu/. 15, August 2003. Cardiovascular Systems Dynamics Lab. 11 Feb 2007 <http://ebat.tamu.edu/bats/>.
- Rambaldini, Daniela A. 2005. Antrozous pallidus, Pallid bat. WBWG Species Account.
- Species Profile at Bat Conservation International
- Rambaldini, Daniela A. and R. M. Brigham. 2008. Torpor use by free-ranging pallid bats (Antrozous pallidus) at the northern extent of their range. Journal of Mammalogy. 89(4): 933–941.
- Rambaldini, Daniela A. and R. M. Brigham. 2011. Pallid bat (Antrozous pallidus) foraging over native and vineyard habitat in British Columbia, Canada. Canadian Journal of Zoology. 89: 816-822.
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Data related to Antrozous pallidus at Wikispecies