Scientists find the world’s smallest reptile that fits on the fingertip

Scientists have identified the Earth’s smallest known reptile, warning at the same time that sustained destruction of forests in northern Madagascar threatens its survival.

Tiny enough to perch comfortably on a fingertip, the ultra-compact chameleon, dubbed Brookesia nana has the same proportions and world-weary expression as its larger cousins around the world.

“We discovered it in the mountains of northern of Madagascar,” Frank Glaw, curator of herpetology at the Bavarian State Collection of Zoology told AFP.

A joint expedition in 2012 of German and Malagasy scientists did not know whether the two specimens collected, one female and one male were adults until much later, he explained.

“We found out that the female had eggs in her body, and that the male had large genitals, so it was clear that they were adults.”

The male’s body was 13.5 millimetres long or half an inch, about the size of a peanut, with the tail adding another nine millimetres.

By contrast, the female measured 29 mm from its nose to the tip of its tail.

The pair remain the only specimens of the species ever found.

Islands connected long ago to neighbouring continents are known for miniaturised versions of animals that crossed ephemeral land bridges, a phenomenon known as “island dwarfism”.

“We have no good explanation as to why this species is so small,” said Glaw.

Since the mid-20th century, Madagascar has lost about 45 percent of its forest cover.

B. nana and another mini-chameleon discovered by Glaw and his colleagues on a small island off the coast of Madagascar are especially vulnerable because their range is so small.

“Brookesia micra lives on less than two square kilometres,” Glaw explained.

Madagascar in a global “biodiversity hotspot”, accounting for five percent of the world’s unique plant and animal species.

The island nation has one of the highest rates of poverty in the world, and lacks resources for conservation and natural resource management.