The Alien Didi is an official Maxis creature, present in the final game. They are green slimy bipedal creatures with strange brown spots, large heads, and short tails.
Alien Didi are social creatures, and although they are omnivores, they tend to only eat fruit from low bushes, due to their weak bite. When they do eat meat, it is often after finding another creature's abandoned prey.
Alien Didi have been seen singing, dancing and posing, as a means of impressing others. Each of these takes a bit of skill, but they all leave something to be desired.