What Is a Stick Insect?

Posey was either the alpha male or the most beaterish male. We don't know which. He was lounging like some sort of mafia boss. It was his territory. And so maybe he'd called a cat meeting and he was sort of lounging there while all these other cats were sort of posturing the best way to overthrow the humans. But it's hard to tell really, but it was pretty, pretty weird. Did we have any other, well, we had gerbils. They had more gerbils at some point. We had stick insects at some point - I think before the gerbil. What's a stick insect? Stick insect