lion
In prehistoric times there were several really mean critters acording to the fossil record. Today the deadliest animal in Idaho is man.
human
One may believe that the deadliest animal to man would be something large or poisonous like a large wildcat or a snake. However, it is said that the 2nd deadliest animal to mankind is the mosquito because of the diseases it can carry, which kill over 600,000 people a year. It is only 2nd to humans themselves.
mankind
the grizzly bear
Man himself.
Mosquito
The Box Jellyfish
wolverines
ADOLF HITLER
Poison dart frogcrocodile
Humans. Lizards.