Bats

At dusk, a biologist wearing protective gloves, removes a bat from a mist net
A big brown bat (Eptesicus fuscus) is removed from a mist net by a park biologist.  Mist nets are used to capture bats without harming them so that these amazing mammals can be studied before they are released. NPS/Miles Brown
 
While they are the only mammals capable of true flight, bats share the same main characteristics as almost all other mammals: the have hair, give birth to live offspring, nurse their young, and can control their body temperature, without relying on the sun for warmth. The Grand Canyon is an important refuge for the 22 bat species that live here, and provides sheltered habitat as more and more bat habitat is destroyed across the planet. Unfortunately, habitat loss is not the only threat to bats. In North America, over 5.7 million bats have been killed by White-Nose Syndrome , a disease caused by a cold-loving fungus (Pseudogymnoascus destructans) that attacks hibernating bats. Current research in the park is aimed at understanding the threat this disease poses to the bats of the Grand Canyon, and how we can protect these incredible animals.
 
Scientific Name
Order Chiroptera (all bats in the Grand Canyon are part of the suborder Vespertilioniformes, formerly known as Microchiroptera)

Identification
  • Unlike birds, bats flap their wings nearly nonstop throughout flight instead of gliding.
  • Bats do not have feathers. Instead they have thin flaps of skin spread between the bones of their wing.
  • When capturing insects, bats tend to have erratic flight patterns.
  • Bats are nocturnal and are very rarely encountered during the day.
  • Bats in the suborder Vespertilioniformes (all bats in Grand Canyon) are identified from other groups of bats by extensive use of echolocation, small eyes, are large ears
Habitat
  • There are almost 1000 species of bats in the world- making up a quarter of all mammal species. They are found across the planet, except in polar regions and extreme deserts.
  • Different bat species prefer different roost locations, but common roosts in the Grand Canyon include ponderosa pines, caves, human structures, and cracks in cliff sides.
  • Before the Grand Canyon was a National Park, it was home to many copper, gold, and uranium mines. Now these abandoned mines make excellent habitat for many bat species.
Behavior
  • Bats are nocturnal, meaning that they emerge from their roosts at sunset or during the night and spend the night searching for food.
  • Most bat species have only one offspring, called a pup, per year.
  • Bats can see as well as humans, but they also use echolocation to navigate and find food at night. Bats echolocate by emitting high frequency calls, and determine how far away an object is by how long it takes an echo of their call to return to them. Using echolocation, bats can also determine the size, texture, and speed of an insect.
 
More Information
 

Bat species found in Grand Canyon National Park

Eumops perotis Western mastiff bat
Nyctinomops macrotis Big free-tailed bat
Tadarida brasiliensis Mexican free-tailed bat
Choeronycteris mexicana Mexican long-tongued bat
Macrotis californicus California leaf-nosed bat
Antrozous pallidus Pallid bat
Corynorhinus townsendii Townsend's big-eared bat
Eptesicus fuscus Big brown bat
Euderma maculatum Spotted bat
Idionycteris phyllotis Allen's big-eared bat
Lasionycteris noctivagans Silver-haired bat
Lasiurus blossevillii Western red bat
Lasiurus cinereus Hoary bat
Myotis californicus California myotis
Myotis ciliolabrum Western small-footed myotis
Myotis evotis Long-eared myotis
Myotis occultus Arizona myotis
Myotis thysanodes Fringed myotis
Myotis velifer Cave myotis
Myotis volans Long-legged myotis
Myotis yumanensis Yuma myotis
Parastrellus hesperus Canyon Bat

 

Bats and Disease

Bats are an important part of any local ecosystem, and many bats live near this area of the park.

  • Bats consume a lot of insects, including insects that can damage crops or forests. Some bats pollinate plants and disperse seeds, and some eat fish!
  • Bats are found in nearly every habitat in the world, and are the only flying mammal.
  • Most bats use specialized echolocation, a kind of sonar, to locate prey and to fly through darkness without crashing into anything (including each other).
  • Most species of bats are only active at night, and sleep in caves, trees, buildings, and other roosts during the day. Some roosts have over a million bats!

The park’s bat species are active mainly at night. Occasionally, you may see a bat out in daylight. However, if you see a bat that is behaving erratically, is unafraid of humans, or is lying on the ground, it may be sick. Humans can get some of the diseases that make bats sick, including rabies, so it is important not to touch or handle bats so that you do not get sick too.

If you see a bat on the ground or acting sick, do not touch it and tell a park ranger right away. If you accidentally contact a bat, report this to a park ranger and talk to your doctor. The bat will be tested for disease and you may need medical treatment to prevent rabies. This can keep both you and bats healthy!

Last updated: February 15, 2018

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Mailing Address:

PO Box 129
Grand Canyon, AZ 86023

Phone:

(928) 638-7888

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