Myotis lucifugus is a small insectivorous species native to North America that roosts in forests, caves, and buildings, emerging at dusk to hunt mosquitoes, moths, and other insects using echolocation and agile flight. Though its scruffy fur, beady eyes, and tiny sharp teeth can make it look more menacing than endearing and sometimes lead to mistaken identity as a vampire bat, it poses no threat to humans, plays an important role in controlling insect populations, hibernates in caves or abandoned mines during winter, and has declined in many areas because of white-nose syndrome.