Müller's Bornean gibbon
The Müller's Bornean gibbon (Hylobates muelleri), also known as the grey gibbon, is a primate in the Hylobatidae family. The Muller's gibbon ranks among the smallest gibbons, weighing . It is about  tall. The grey gibbons can live more than 40 years in captivity. They eat primarily fruit, leaves, flowers, and invertebrates.