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Smithsonian National Museum of Natural History, North American Mammals

  Chiroptera · Vespertilionidae · Lasiurus intermedius

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Lasiurus intermedius

Northern Yellow Bat

Order: Chiroptera
Family: Vespertilionidae

Image of Lasiurus intermedius
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Conservation Status: Least Concern.

Clumps of Spanish moss make good daytime roosting places for northern yellow bats. Small groups of males or slightly larger groups of females are often found roosting together in forested areas near a permanent source of water. They are seldom found roosting in houses or other manmade structures. They feed over open spaces: they are seen over golf courses, beaches, and along the edges of ponds, hunting for mosquitoes, flies, and other insect prey. Barn owls are known to prey on them. Unlike most other Lasiurus bats, they have only two nipples, and if a female gives birth to more than two offspring, usually only two survive. Young are born in May or June and are flying by June or July.

Also known as:

Eastern Yellow Bat, Florida Yellow Bat, Greater Yellow Bat, Big Yellow Bat

Sexual Dimorphism:

Females are larger than males.


Range: 121-131.5 mm


Average: 17 g
Range: 14-20 g


Allen, H., 1862.  Descriptions of two new species of Vespertilionidae, and some remarks on the genus Antrozous. Proceedings of the Academy of Natural Sciences of Philadelphia, pp. 246-248.


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Distribution of Lasiurus intermedius

Image of Lasiurus intermedius
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Skull of Lasiurus intermedius
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