ranacide

— Did you ever watch a frog catching flies? The old hypocrite sits there, with his eyes partially closed, as if he were half-asleep. But let an unwary fly come too near, when, snap! he darts a long, slender tongue out like a flash, a wave runs down his throat, and he blinks his eyes with a solemn satisfaction that, if it only had an element of exultation in it would certainly render ranacide justifiable under those circumstances.