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Species account of the Mule

MULE*
Equus caballus × Equus asinus

Order Perissodactyla : Family Equidae

*Introduced species

The hybrid between a jack (male ass) and a mare (female horse) is a mule, valued as working and riding animals. They are usually sterile. Mules may be found on many farms and ranches across Texas but seldom pose any sort of conservation problem.

Photo of the skull of Equus caballus x Equus asinus

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From The Mammals of Texas, Seventh Edition by David J. Schmidly and Robert D. Bradley, copyright © 1994, 2004, 2016.  Courtesy of the University of Texas Press.

Natural Science Research Laboratory