a black, Y-shaped line that starts above each eye and joins together as a single line on the top of the head, creating the fork that gives these animals their common name;
large hands and feet for gripping onto trees;
a loud, high-pitched night-time call which helped the team track it down;
an unusual head-bobbing behavior that shows up in the beam of the flashlight at night and is unique to this species;
a diet consisting of a high proportion of gumexuded by trees and flower nectar;
a long tongue for slurping up nectar and recumbent incisors, which form a toothcomb specialized as a scraping tool to bite into the bark.