In a species of desert lizard, only females are known to exist. It is necessary for two females to court and for one to assume the posture of a male to stimulate the other female to ovulate. Of course, no fertilization can occur. This is a case of

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This is a case of parthenogenesis, where the female lizard is able to stimulate her own ovulation without the involvement of a male, but still requires mating behavior with another female in order to do so. This process results in the production of viable eggs without fertilization.

In a Species of Desert Lizard, Only Females Are Known