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The Little Brown bat (sometimes called Little Brown myotis) (Myotis lucifugus) is one of the most common bats of North America, a species of the genus Myotis (mouse-eared bats), found throughout the world.


 


Weights and Measures: As suggested by the bat’s name, their fur is glossy and uniformly dark brown on the back and upper parts with slightly paler, greyish fur underneath. Wing membranes are dark brown on a typical wingspan of 8.7-10.6 inches ( 221-269mm ).

Ears are small and black with a short, rounded tragus. Adult bats are typically 4.6-5.6 inches (117-168mm ) long and weigh 0.19-0.46 ounces ( 5-13g ). All teeth including molars are relatively sharp, as is typical for an insectivore, and canines are prominent to enable grasping hard-bodied insects in flight.

The Little Brown bat has an expected lifespan of up to 30 years.

Little Browns Abound: The Little Brown bat is found all over North America from northern Mexico to southern Alaska, and is the most abundant bat found in the United States.


Little Brown Babies: Little Brown bats give birth usually to a single young between the end of May through the middle of July with occasional twin births. The newborn is blind, opening their eyes on their second day, and remains attached to a nipple until it is approximately two weeks old. The young can fly at three weeks of age and attain adult weight at 4 weeks.


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 Kingdom: Animalia

 Phylum: Chordata

 Class: Mammalia

 Order: Chiroptera

 Family: Vespertilionidae

 Genus: Myotis

 Species: Lucifugus