Some whiptail lizards (a species found in the southern U.S.) possess genes that appear to come from two different species, and they only produce female offspring.

All moms and no dads, the whiptail still comes up with genetically diverse offspring. This New Mexico whiptail lizard (Aspidoscelis neomexicana) was photographed at the Henry Doorly Zoo and ...

In a sexually reproducing lizard species, each lizard has 23 chromosomes from its mother, and 23 from its father. Image Whiptail lizards that reproduced in a laboratory, isolated from males.

There is no war between the sexes with the Colorado checkered whiptail. That’s because she’s always female. In dry canyons and grasslands, these lizards reproduce through parthenogenesis.

This variety of whiptail lizard is one of 10 species in that genus who reside in Texas and it's arguably the smallest one. Adults of this species rarely approach 9-inches in total length.

An extremely rare, possibly endangered lizard could be living in the Chinati Mountains of West Texas. Biologists from the University of Texas, Arlington plan to locate the Dixon's whiptail and ...