Researchers have discovered a new species of frog in Borneo which only grows to the size of a pea. Finding the mini frogs, named Microhyla nepenthicola, proved to be a challenge due to their size. Adult males range in length from 10.6 to 12.8 millimeters.
There are some specimens of these frogs in museum collections that are over 100 years old. Scientists presumably thought they were juveniles of other species, but it turns out they are adults.