Scientists in India have made a sweet discovery: Seven new frog species, four of which are about the size of an M&M.

Commonly known as night frogs, the animals live only in the Western Ghats—a biologically rich mountain range that runs down western India.

The discovery adds to the 28 known night frog species, more than half of which have been identified in the past five years. (See pictures of more frogs found in the Western Ghats, including the meowing night frog.)

Sonali Garg, a Ph.D. student at the University of Delhi, says that finding the night frogs—among the smallest on Earth—was tricky.

For one, they're tiny. The smallest of the newfound species is 12 millimeters long; the world's smallest