The Little Brown Bat

By Aidan and Kayla

The Little Brown Bat or Myotis lucifugus

Life Span and Reproduction

They usually live up to 6 or 7 years although the longest one to live, lived up to 31 years.

The male's mate in late Autumn by swarming the entrance of hibernation sites. Females store the sperm and bear the pup by hanging head up and expelling the newborn into the cupped tail membrane in late June or July. The pups stay with their mother for about a month. The bats know which pup is theirs by it's smell.


The Little Brown Bat uses echolocation to find insects. They eat half their body weight in insects and new mothers sometimes eat more. They're active a few hours after dusk.


The Little Brown Bat's role in the envioment is pest control. They eat small bugs which helps keep the amount of pests in our environment in-check and helps farmers.

They can travel up to 100 miles to find a place to hibenate. They tend to hibernate abandanded caves or mines. Hibernation can last up to 83 days. They clump together to stay warm.

They spend a lot of time gromming by using their claws to clean their fur and tonge and teeth and clean their wings.

They stay in large groups(colonies) up 300,000 bats per roost.

They're not territoral.

Specialized Adaptations

White Nose Syndrome

White Nose Syndrom is a fungus that grows on bat's noses and wakes them up while they are hibernating. They then starve by burning all their body fat and not finding food. The Little Brown bat is most affected by it, and trying to adapt, they stop hibernating so close together to help slow down the spread.

Temperature and Water

Like adapting to the White Nose syndrom, The bats adapt to the cold areas they live in by controling their body tempurture. (Ranging from 6.5 degrees celcius to 54 degrees celsius.) This way they can stay warm in their cold caves.

Also some of the subspecies can survive on a lower supply of water allowing them to survive in drier climates.


They have a wingspan of 8-11inches. Females are usually larger than males. They weigh about less than an ounce

Works Cited

  • "Little Brown Bat(Myotis Lucifigus)." Little Brown Bat. N.p., n.d. Web. 07 Jan. 2015.
  • "Endangered Status Proposed for Bat Plagued by White-nose Syndrome - BirdWatching." BirdWatching. N.p., 18 Oct. 2013. Web. 13 Jan. 2015.
  • "Little Brown Bat - National Wildlife Federation." Little Brown Bat - National Wildlife Federation. N.p., n.d. Web. 13 Jan. 2015.