Southern Yellow Bat - Illustration by George Maleski

Southern Yellow Bat
Lasiurus ega


This species is a small to medium sized bat with short round ears and dense fur. The fur is usually yellowish in color, but can range from yellow-orange to brownish-gray.

Habitat: The southern yellow bat is typically associated with trees.1 In the urban areas of Tucson and Phoenix, the preferred habitat of the bat are Washington fan palms.2

Range: L. ega is found in southern California, southern Arizona, southern Texas, and throughout tropical and subtropical Latin America.3 In Arizona, the bat is found year-round.

Diet : The bat is a nocturnal species, foraging one to two hours after sunset. They feed on small to medium-sized flying insects.4 They usually feed near their roost, and go no farther than necessary for water.1

Reproduction: This species mates between August and October. The female bat stores the sperm in the uterus until spring when fertilization occurs. Estimated gestation is 80­90 days, and average litter size is two to three pups.5

Status: The southern yellow bat is listed as an Arizona Species of Special Concern.1 The bat falls under the protection of Commission Order 14 which states no bat may be taken dead or alive.6

The Southern Yellow Bat in Pima County: Threats to this species includes loss and degradation of riparian habitat, burning of native palms, and possibly pruning of urban palms.1


1. BISON-M Taxonomy. 1997. Lasiurus xanthinus.

2. Hoffmeister, Donald. 1986. Mammals of Arizona. University of Arizona Press Arizona Game and Fish. Pp.100-101.

3. Tuttle, Merlin. 1988. America's Neighborhood Bats. University of Texas Press Austin. Pp.74-76.

4. Sanchez-Brown, T.C. Lasiurus ega. 12/2/99 Web site http//

5. Fahey, Bridget. Lasiurus ega. University of Michigan. Animal Diversity Web.

6. Snow, Tim K. Western Red Bat Lasiurus blossevillii. 8/23/99 Web site

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