This bit has caused me some thought, and it hurts. But the real bad guys of the animal world don't lie so much. It's the wimps. A coral snake doesn't lie he lets you know he'll bite and it will be bad - the kingsnake is a wimp and is along for the ride. A rattlesnake isn't lying, but he lets you know he's dangerous. A pack of hunting lionesses don't lie, they just catch the zebra and eat him.
Since people of certain persuasions lie, they must be wimps too.
On the other hand, king snakes can and do eat coral snakes ;)