Like the Phasmids (stick & leaf insects) they eat blackberry, raspberry, oak, maple, rose, lilac, Ivy... large soft leaves. The Horseheads do get 6 - 8" but look more like a chrome stick insect than a grasshopper. I just love their silly claymation faces.
You know, the common grasshopper is what caused me to be afraid of insects for the first 20+ years of my life. When I was a toddler one jumped on the front of my Hee Haw overalls and wouldn't get off I can remember screaming and screaming and waving at it and it just hung there probably wondering what the problem was. It wasn't until I got into mounting dried exotic insects in Riker frames about 10 years ago that I overcame my fear by fascination.