Winning a fight isn't what makes a creature hard. It's the fearless attitude and willingness to take on beasts even with the odds stacked against them.
The Brazilian Wandering Spider takes on an insect, but the Mantis is taking on a much feared Spider.
Tarantula Hawk - The wasp that kills tarantulas
http://www.bbc.co.uk/earth/story/20150109-the-wasp-that-scares-tarantulas
The pain inflicted by a tarantula hawk’s sting has been rated by Dr Schmidt as one of the worst in the insect world. He created the Schmidt sting pain index as a pain...