Unisexual species reproduce by parthenogenesis in female.
Females raised in isolation in cages gave birth to females. Furthermore, the progeny females, also raised in isolation, gave birth to only females. In one location in New Mexico, a unisexual species, C. neomexicanus , is found sharing edges of its territory on either side with two bisexual species, C. inornatus and C. tigris . The unisexual species therefore appears to be a hybrid of the two bisexual species. The observations support the hypothesis that some species of whiptail lizards reproduce by a true parthenogenetic mechanism.