With its scraggly fur and piercing gaze, the aye-aye—filmed here by Joel Satore—has often been considered bad luck, but these misunderstood primates could be vital for conservation. Clove trees on the east coast of Madagascar have been ravaged by leaf miner larvae—which aye-ayes happen to be very good at hunting. Learn more about nature's unloved animals: https://on.natgeo.com/4l6QMzy Narrated by Ryan Reynolds, #Underdogs premieres Sunday, June 15 at 9/8c on National Geographic TV, simulcast on