There are 3 animals that come to mind.
Tasmanian Devils - they are ferocious! They lock onto their prey and follow them for miles until the perfect time to strike.
Ravens - contrary to popular belief, they are among the most intelligent animals in the animal kingdom. Ravens are the largest song birds capable of singing a host of distinctly different songs. Why do you think Noah chose a raven before a dove?
Box Jellyfish - the sting from one of these is nearly 100% deadly. If the poison doesn't kill you, then the pain from the sting will.
If animals knew chess, which one would be the champ?
(plz exclude humans+monkeys)