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Lasiurus ega

Southern Yellow Bat

Order: Chiroptera
Family: Vespertilionidae

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Credit: New Mexico Bat Call Library, W. L. Gannon
Image of Lasiurus ega
Lasiurus ega - inset shows white hairs on underside of wing
Click to enlarge. (73 kb)

Conservation Status: Least Concern.

A strong flier with yellowish fur, the southern yellow bat is a lowland species, adapted to both dry and wet habitats. It roosts in trees, particularly palms. These bats are often seen hunting over water, including over swimming pools. Very few species of bats have more than one or two young at a time, and most have just two nipples, but some bats in the genus Lasiurus have four nipples and can have triplets or quadruplets. Southern yellow bats most often have triplets. The young bats nurse for about two months before they are able to fly and forage for themselves.

Also known as:
Western Yellow Bat, Tropical Yellow Bat

Sexual Dimorphism:
Females are larger than males.

Average: 115.1 mm
Range: 102-118 mm

Average: 11.9 g
Range: 10-14 g


Gervais, P., 1855 [1856].  Mammifères. Pp. 1-116 in Expédition dans les parties centrales de L'Amérique du Sud, de Rio de Janeiro à Lima au para; exécutée par ordre du gouvernement Français pendant les années 1843 à 1847, sous la direction du Comte Francis de Castelnau (F. de Castelnau, ed.) p. 73.  Septième Partie. Zoologie. Tome Premier. Deuxième Mémoire, P. Bertrand, Paris.


Mammal Species of the World

Mammalian Species, American Society of Mammalogists' species account

Distribution of Lasiurus ega

Image of Lasiurus ega
Click to enlarge. (118kb)