Northern myotis
ExploreMyotis septentrionalis
Type: mammal
Status:
Species Guide
Northern myotis
Myotis septentrionalis
Species Type: mammal
Conservation Status:
IDENTIFICATION
The northern long-eared bat (a.k.a. northern myotis) is one of four New Jersey bat species belonging to the Myotis genus. It is similar in size and appearance to the little brown bat (M. lucifugus) and Indiana bat (M. sodalis), with an average weight of 6 to 9 grams, a body length of around 3 inches, and a 9 to 10 inch wingspan.
The northern long-eared bat's rounded ears are longer than those of its relatives, though not dramatically; they are 17 to 19 mm (~0.7 inch) long and extend past the bat's snout when folded forward. The northern's tail and wings are also generally longer than those of other Myotis species. Its fur is brown with a dull yellow hue and a darker spotting pattern on its shoulders. Females of this species are usually larger than males.
Distribution & Habitat
DISTRIBUTION AND HABITAT
The northern myotis can be found from the boreal forests of northwestern North America (Alberta, Canada, and surrounding territories), east to Newfoundland, and south through most of eastern North America, including the central and south-central U.S. states.
These bats inhabit dense forests, roosting by day beneath the loose bark of trees or in tree crevices. They are more solitary than other myotids and often roost alone, but will form maternity colonies consisting of mothers and their young. Little is currently known about their feeding habits, but northern long-eared bats have been seen foraging for insects among trees and above ridge lines, along forest edges, and occasionally over water bodies.
They hibernate in winter, preferring the cool, stable temperatures provided by caves and abandoned mines. Though rarely, the northern myotis may use buildings as both summer roosts and winter hibernation sites.