re:the crocs in central Africa drowning large animals. They just wait for beginning decomposition to tenderize the flesh.
Yes, along with not haveing lips, most reptiles can't gnash their teeth.. they chomp down, and then twist their whole body to rip off bite sized chunks of flesh.. the can't use their jaw to rip meat of the bone.. and they have no molar like teeth.. (for grinding up food in their mouths-- and no cheeks to keep food in their mouth.)
their jaws only move up and down, not side to side. and the muscles for opening the jaw are weak (but for closing ! oh my, they can exert hundreds of pounds of pressure)
so croc hunters tricks always include, getting on the animals back or neck and clamping the mouth shut! 10 or 15 pounds of pressure will keep it closed..
