The muzzle clamp is a method of killing used by big predators, usually cats such as Panthera leo, the lion, Panthera pardus, the leopard, and Panthera uncia, the snow leopard. It requires the subduing of prey, usually completely on the ground and pinned by the predator, and the engulfing of the muzzle of the prey entirely in the mouth of the predator, blocking respiration through either the mouth or nose.