| The scientific name "myotis" comes from two Greek words that mean "mouse ear." Myotis bats depend on echolocation to hunt, using their ears to receive echoes that help them pinpoint prey. They are so good at this that they can intercept an insect in flight, while at the same time avoiding obstacles and each other. Typically, when they return to the roost after hunting, they land head-up, catching hold with their thumbs and then flipping around to roost head-down. There are about 100 species of bats in the genus Myotis. The Peninsular Myotis, from Baja California, Mexico, was formerly thought to be a subspecies of the much more widespread Cave Myotis, Myotis velifer, but recent work suggests that it is genetically distinct.
Total Length: 56.7 mm
Total Length: 44.2-55 mm
Miller, G.S., Jr., 1898. Annals and Magazine of Natural History, ser. 7, 2:124.
Mammal Species of the World (opens in a new window).
Mammalian Species, American Society of Mammalogists' species account (opens in a new window).