The New Mexico whiptail is a female-only species that reproduces without any male involvement.

Nature · Published 3 October 2026 Swipe more like this →

In short: In the arid landscapes of the American Southwest, the New Mexico whiptail thrives as an all-female species. Through a unique biological process called parthenogenesis, these lizards reproduce without males, creating a population that has captured scientific interest and cultural attention alike for its unconventional and highly successful survival strategy.

The New Mexico whiptail, or Aspidoscelis neomexicanus, is a remarkable product of interspecific hybridization. It originates from the mating of two distinct species: the little striped whiptail and the western whiptail. This crossbreeding results in a population consisting entirely of females, as the hybridization process prevents the development of healthy males. To sustain their numbers, these lizards rely on parthenogenesis, a form of asexual reproduction where females produce offspring from unfertilized eggs.

Despite the absence of males, these lizards still engage in mating rituals with other females. This behavior is often linked to the stimulation of ovulation; research suggests that individuals that do not participate in these interactions fail to lay eggs. This unique reproductive cycle has earned them the nickname lesbian lizards, and the species has even gained recognition as a cultural icon in various online spaces. The lizards are diurnal, insectivorous creatures that feed on a variety of prey, including spiders, termites, and beetles.

Physically, the New Mexico whiptail is a slender reptile, typically measuring between 6.5 and 9.1 inches in length. They are characterized by a brown or black body marked with seven pale yellow stripes, often accompanied by light-colored spots. Their appearance changes as they mature, with their infant blue-green tails eventually darkening to match their spotted bodies. They are highly active, fast-moving animals that inhabit diverse semi-arid environments, ranging from grasslands and rocky terrain to mountainside woodlands.

The species is the official state reptile of New Mexico and is found across the southwestern United States and northern Mexico. They are active from mid-March through mid-October, though they often seek shelter during the hottest parts of the day. In mid-summer, females lay up to four unfertilized eggs, which hatch approximately eight weeks later. This combination of hybridization and parthenogenesis serves as a highly effective reproductive strategy within the genus Aspidoscelis, allowing the species to flourish in challenging, arid habitats.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?

Related

• The Teiidae lizard family features everything from massive predators to all-female cloning colonies.
• Can vertebrates reproduce without a mate? The surprising science of parthenogenesis
• Some lizard species have completely abandoned the need for two sexes to reproduce.
• Why these tiny lizards are the ultimate masters of territorial display and survival
• The mysterious blind lizards that defy classification and live hidden beneath our feet
• Why these ground-dwelling birds are not actually related to their Old World lookalikes
• The New World weasels are a distinct evolutionary lineage hiding in plain sight
• New Zealand’s flightless, nocturnal parrot is staging a remarkable recovery from near-total extinction.
• The Hawaiian Goose: A Rare Bird That Traded Its Webbed Feet for Lava
• The only pinniped species to move deep into forests
• Why these slender, silvery fish are more dangerous to Pacific Islanders than sharks
• The only truly nocturnal monkeys evolved from ancestors that were active during the day.

More in Vertebrates · More in Nature · Latest · A–Z · All topics