I tried

So I've had this idea for an alien race for ages now. I thought of it when i thought of how a 3 gender based system could work, so yeah i got the biology down. This would be the 3rd gender one, characterized by tall and thin torso and thin tail, in evolutionary times this would have been more of a scout, built for speed and climbing. A general rule of thumb for these guys would be hips and shoulders are the same width. The tail is dexterous and it was originally evolved for balance up high. I didn't do too good of a job drawing it out, and i gave up even doing the face, but it has the basic shape down so I'm happy. The blue and orange were what i was using to sketch