they have an alkaloid based toxin they release from their knees that is foul smelling and tasting (I dont know that second part from personal experience). Most animals know enough after the first few bugs to stop eating them, and I think your cham would have to eat A LOT to get a significant enough dose of the toxin. Most large animals are relatively unaffected by the toxin unless they eat a large dose, its supposed to serve as a deterrent to teach the animal not to eat more ladybugs as opposed to killing them outright
simple answer, yes