Watch it, dickhead! Hey, Stan, that's my shirt you just dropped in the snow!

The Pitella (pronounced Pitayo) and the Saguaro are the most prized.

You try for his head, but he's hedgehogged round now, elbows beside his ears and you can't get him.

The purpose of worldbuilding isn't just to do a cool exercise, but to give a sense of place — and all of your thought experiments absolutely have to result in something vivid and alive.