Journey with Nature

Indiana Bats

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As a federally endangered species since 1967, it goes without saying that the recent sudden deaths of Indiana Bats across the eastern United States have been the cause of much concern for conservationists and scientists alike. Called the white-nose syndrome, this disease has put the risk to the Indiana Bat at an all-time high.

To the Bat Cave! Indiana Bats and their Habitats

Indiana bats were first found in the Wyandotte Caves of southern Indiana, hence the name. However, it is their scientific name - Myotis sodalis - that describes these bats perfectly. Myotis means "mouse ears" which refers to the tiny, mouse-like ears that all bats in this genus share. The species name - sodalis - means "companion" in Latin, and refers to their highly social nature.

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Indiana bats are also known as the social bat and for good reason. During hibernation, Indiana bats will cluster together in large groups in their hibernacula - caves in which bats hibernate. Huddling close together allows the bats to keep warm and muffles sound to limit any disturbances. Bat clusters also serve as an early warning system against predators. Bats outside of the mass can easily, and quickly, alert the other bats that danger is near.

Indiana bats are not only found in caves nor do they only exist in the Hoosier state. Indiana bats can be found in most of eastern United States, though the largest populations are found in Indiana, Kentucky and Missouri. Our Harrison County Glades and Twin Creek Valley preserves are home to Indiana Bats. After hibernation, Indiana bats migrate to summer roosts, which are generally the edges of hardwood forests. Females tend to stay together, making homes with their pups under the loose bark of trees. There are some questions as to why males roost singly or in small groups and not with the females.

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There are even more questions to the unprecedented die-offs of thousands of Indiana bats in northeastern United States. Scientists have found evidence of a fungal disease - called white-nose syndrome - which may or may not be symptomatic of an even graver disease. You can track the spread of white-nose syndrome here.

Interesting Facts about Bats
  • The Indiana Bat is the only animal named for our great state.
  • Bats are the only mammals that can fly.
  • "Blind as a bat?" Not for these little guys. Bats have excellent eyesight perfect for long-distance homing.
  • Bats also use echolocation to find their way around. By emitting calls then listening to the echoes of those calls, they can determine where various objects are located in the dark.
  • Indiana bats tend to return to the same hibernacula every year. About 238,000 Indiana bats, approximately 46 percent of the total population, winter in Indiana caves.
  • Hibernacula must be draft-free and maintain a stable temperature of under 50° F but above freezing for hibernation.
  • Bats hibernate as a way of survival as there are no insects for them to eat during the winter months.
  • Indiana bats are beneficial! Bats consume billions of insects every year and at no cost to the agriculture industry who could use the help. They are also great pollinators and spreaders of seeds.

Indiana Bat Quick Facts
  • Scientific name: Myotis sodalis
  • Length: 3 - 3.5 inches
  • Wingspan: 9.5 - 10.5 inches
  • Weight: 0.16 - 0.34 ounces
  • Characteristics: varies from dark to light brown, sometimes a dullish gray; distinguished by pink lips
  • Habitat: in winter - caves and mines; in warmer months - females and their young will roost under the bark of large trees; unclear where males go
  • Range: the midwestern, southern & eastern parts of the United States; locations more limited in the winter than in the summer
  • Diet: small insects
  • Reproduction: breed once a year, in the fall; average of 1 pup a season; gestation lasts for 60 days
  • Lifespan: average of 14 years
  • Conservation status: federally and state endangered specie;restricted to only a few caves; increasingly threatened by white-nose syndrome