Look twice. That’s not a stick. It’s not even a walking stick. It’s a grasshopper!
The stick grasshoppers comprise the family Proscopiidae, and are unique to South America. Aside from their jumping hind legs, their heads are very distinct from that of a walking stick: elongate, with a mouth near the bendable neck, and eyes further along the length of the head.
These guys were all over Argentina and fun to watch. This particular fellow was posing on a flower all by himself, so I had to snap a picture. Here’s another stick hopper, this one particularly cryptic: