Something as simple as stepping on a twig, brushing on grass, the crumpling of a plastic or some kinds of clothing can be enough. It makes sense, since their bo

Something as simple as stepping on a twig, brushing on grass, the crumpling of a plastic or some kinds of clothing can be enough. It makes sense, since their bodies are much more fragile and distance is easy. Their ears are almost like ours internally, with different structure.