A foaming grasshopper found in Kamberg, South Africa. Someone handed me this grasshopper, and it started making this crackling noise and gushing this black, foul smelling foamy liquid from under its wings. So I put it down on this rock. A foaming grasshopper, member of the gawdy grasshopper family. The foam is foul tasting to predators, and the bright colors are a warning to would-be predators that they are toxic to eat.