With its fuzzy tail, tufted ears, and curious eyes, this squirrel is not only adorable-it’s also incredibly elusive. It spends its life scampering through mossy branches, feeding on bark, fungi, and lichens.

Fact: This species (Exilisciurus exilis) is one of the smallest squirrels ever recorded-and one of the hardest to spot in the wild!

Photo by Ch’ien C. Lee