The World’s Smallest Reptile May Be this Nano-chameleon

Quick Take

• The nano-chameleon is widely called the world's smallest reptile, though the title itself quietly hints at a catch. See the size record →
• Male nano-chameleons hold a record that puts them at an unexpected disadvantage compared to females of their own species. Explore the size difference →
• Scientists had to scan two tiny specimens to prove they weren't looking at baby lizards, and the evidence they found inside was unexpected. See how adults were confirmed →
• For over a decade, everything known about this species rested on just two animals. Then a 2026 search changed the picture in a small but significant way. Read about the 2026 search →

The nano-chameleon (Brookesia nana) is a critically endangered lizard found exclusively in the Sorata massif montane rainforests of Northern Madagascar. Unlike its larger arboreal cousins, Brookesia nana cannot dynamically change colors. Its appearance is characterized by a mottled brown color that provides optimal camouflage among dead leaves of its habitat on the rainforest floor. These tiny lizards weigh less than 0.002 ounces, but are they truly the world’s smallest reptiles? Continue reading to find out the answer and learn more fascinating facts about nano-chameleons.

Are Nano-chameleons The World’s Smallest Reptile?

Nano-chameleons are widely considered the world’s smallest known reptiles. This miniature lizard displays significant differences between males and females, a phenomenon known as sexual dimorphism. Adult males measure less than one inch from head to tail, while female nano-chameleons are slightly larger, measuring 1.14 inches in total length.

These tiny reptiles live at elevations of approximately 4,300 feet above sea level. Nano-chameleons are strictly terrestrial, spending their entire lives within the leaf litter and low-lying vegetation on the forest floor. The dense canopy traps moisture and shields the forest floor from direct sunlight.

During the day, nano-chameleons remain in the fallen leaves and decaying organic matter on the rainforest floor, hunting for minuscule invertebrates. At night, nano-chameleons climb onto low-hanging vines, twigs, and grass blades just a few inches above the ground to sleep, helping them avoid ground-dwelling predators.

Discovery of the Nano-chameleon

Scientists first recorded the nano-chameleon in 2012 during a field expedition in Madagascar. The research team found two adult specimens, a male and a female. Despite extensive searching, the researchers did not find any additional individuals.

Micro-CT scans were performed to examine the animals internally, which revealed that the female was carrying two developing eggs and the male possessed fully mature reproductive organs. This provided evidence that the specimens were a distinct species and not the juvenile stage of an established species.

Following years of genetic, molecular, and morphological analysis, the team officially described and published their findings in January 2021.

For nearly a decade after its 2012 discovery, all scientific knowledge about the nano-chameleon was based solely on the first two specimens collected. However, a study published in March 2026 reported that field scientists had located seven additional individuals within the Sorata massif. This new group included four adult males, one adult female, and two hatchlings.

Are Nano-chameleons Endangered?

The nano-chameleon is considered critically endangered. Its rainforest habitat is currently under severe threat from deforestation, slash-and-burn agriculture, and fragmentation, which jeopardize the micro-ecosystem this tiny lizard requires to survive. The discovery of this new group confirms that a breeding population still survives in the wild, offering hope that this petite reptile will continue to exist.