Indiana Bat

Scientific Name: Myotis sodalis

Weight: 7-8 grams

Wingspan: 24-27 centimeters

Distribution: Cave regions in the eastern United States.

Ecology and Behavior: Indiana bats usually hibernate in large dense clusters of up to several thousand individuals in sections of the hibernation cave where temperatures average (38-43* F) and with relative humidities of 66-95%. They hibernate from October to April, depending on climate conditions. Females depart hibernation caves before males and arrive at maternity roosts in mid-May. The summer roost of adult males often is near the maternity roosts, but where most spend the day is unknown. Others remain near the hibernaculum, and a few males are found in caves during summer. Between early August and mid-September, Indiana bats arrive near their hibernation caves and engaging in swarming and mating activity. Swarming at cave entrances continues into mid or late October. During this time, fat reserves are built up for hibernation.

Food Habits: When pregnant, females eat soft-bodied insects: they eat moths when lactating, and moths, beetles, and hard bodied insects after lactation. Males also eat a variety of insects.

Reproduction: One young id born in June is raised under loose tree bark, primarily in wooded streamside habitat. Lifespan of nearly 14 years have been documented.

Status of Populations: Endangered. Present total population is fewer than 400,000, with more than 85% hibernating in only seven locations making them extremely vulnerable to destruction. Populations continue to decrease.