The Toxic Red-Bellied Newt
This red-bellied newt, Taricha rivularis, defends itself against a threat by displaying its tomato red underside. The more danger the creature perceives, says AmphibiaWeb, the closer the head and tail and head bend towards each other. In addition, says the site, the newt secretes a toxic substance while it is arching.
If any animal ignores the bright red coloration which signals poison, then they are in for an unpleasant surprise. The skin of the newt has been estimated to contain enough toxin to kill between 1000 and 2500 mice. And, yes, if eaten, the poison is enough to kill a human. If you do pick one up, wash your hands well afterwards.