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Smithsonian National Museum of Natural History, North American Mammals

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  Chiroptera · Vespertilionidae · Myotis austroriparius

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Myotis austroriparius



Southeastern Myotis



Order: Chiroptera
Family: Vespertilionidae

Image of Myotis austroriparius
Myotis austroriparius - typical gray coat on right, orange-brown variant on left
Click to enlarge. (87 kb)

Conservation Status: Least Concern.


The southeastern myotis occurs as far west as northeastern Texas and southwestern Oklahoma. Its preferred daytime roosts are caves with pools of water. It forages over water, at time of night when many species of aquatic insects emerge. It has not been found to migrate. This is the only myotis that has twins. Pups are born in late April and May.

Also known as:
Mississippi Myotis

Sexual Dimorphism:
Females are larger than males.

Length:
Average: 83.7 mm males; 87.2 mm females
Range: 77-89 mm males; 80-97 mm females

Weight:
Average: 5.9 g males; 6.9 g females
Range: 51.-6.8 g males; 5.2-8.1 g females

References:

Rhoads, S.N., 1897.  A new southeastern race of little brown bat, p. 227. Proceedings of the Academy of Natural Sciences of Philadelphia, 49:227-228.

Links:

Mammal Species of the World (opens in a new window).

Mammalian Species, American Society of Mammalogists' species account *
* PDF reader available here (opens in a new window).

Distribution of Myotis austroriparius

Skull of Myotis austroriparius
Click to enlarge. (22kb)

Image of Myotis austroriparius
Click to enlarge. (138kb)