Peruvian Tarantula (Pamphobeteus sp.) adult, walking over Humming Frog (Chiasmocleis royi) without preying on it. Los Amigos Biological Station, Madre de Dios, Amazonia, Peru. These species have a commensal relationship. The tarantula protects the frog whilst the frog foraging keeps ants away from the tarantulas eggs.