Attacking and feeding behavior of Badister pictus adults A adult biting the outer lip of Zonitoides arboreus (Say, 1816) B adult feeding on the soft body after opening the shell of Z. arboreus C adult breaking the shell of Opeas pyrgula Schmacker & Boettger, 1891 D adult biting the outer lip of Metalycaeus hirasei (Pilsbry, 1900) E adult feeding on the soft body from the broken shell of Hippeutis cantori (Benson, 1850) F adult biting the basal lip of the sinistral snail Physa acuta Draparnaud, 1805.