The Myotis lucifugus, commonly known as the Little Brown Bat, is a small insectivorous mammal with a wingspan of 8.5-11 inches. It thrives in a variety of habitats, including forests and urban areas, and is known for its agile flight and echolocation abilities used to hunt insects at night.

Myotis lucifugus, commonly known as the Little Brown Bat, is native to North America. Its geographical distribution covers a wide range, including most of the United States and Canada. It can be found from the southern parts of Alaska, across Canada, and throughout the continental United States, extending as far south as northern Mexico. The species is notably absent from the southeastern United States and parts of the southern Great Plains.

The Little Brown Bat typically inhabits areas with water sources such as lakes, rivers, and streams, which support abundant insect populations, their primary food source. They are adaptable to various climates, from temperate to boreal regions, and show a preference for forested areas that provide roosting sites.

Myotis lucifugus occupies an ecological niche as an insectivorous predator, feeding on a variety of night-flying insects, including mosquitoes, moths, and beetles. They are crucial for controlling insect populations. They roost in a variety of structures, such as tree hollows, caves, and buildings. In winter, they hibernate in caves or mines, where stable temperatures and humidity levels are essential for their survival.