Hadozees

Hadozees’ progenitors were primates no bigger than housecats. Hunted by larger natural predators, they took to the trees and adopted an arboreal lifestyle

Today, hadozees are sapient, bipedal beings eager to leave behind the fearsome predators of their homeworld and explore other worlds.

In addition to being natural climbers, hadozees have feet that are as dexterous as their hands, even to the extent of having opposable thumbs. Some types of Hadozee sport membranes of skin that hang loosely from their arms and legs. When stretched taut, these membranes enable hadozees to glide. Hadozees wrap these wings around themselves to keep warm. Other phenotypes evolved to be either exceptionally nimble or strong - compared to other species.

The RAW of Spelljammer describes a very defined appearance for Hadozee. In my universe, their shape is a bit more varied and runs the entire gamut of humanoid primates.

If you wish to play such a different form, the stats for the specie can be adjusted accordingly.