We have ZERO defense mechanisms. It's ridiculous.
Porcupines, skunks, camouflaging lizards, puffer fish, clawed cats, winged animals, things that crawl up trees real fast, powerful bites, powerful swats, fast runners, hoppers, turtles and armadillos with them hard arse shells.
Animals have all kinds of characteristics that can protect them to some extent.
We don't have jack SHEET!
Wouldn't the ability to fade into the wall come in handy if you happen upon some robbers (or that old guy at work who greets you with, "Well, well, well, how you doing little lady?")
I wanna fly like a bird and jump off stuff like a cat. I really do.