If this is a nomination, I will second. Not so much as to it's deadly toxic venom, but more so once it get's into this kind of mood:
This is not just a warning stance, but also an attack one too.
If it decides to go into its "Death Dance", do not try to take it on. It will keep coming for you...
Not discrediting the Mantis in terms of how fearless and plucky it is, just that it's no match for my Spider from last year. (Which is so deadly, if no treatment received asap, can kill a fully grown human and has been known to prey on much larger animals too).
Sorry to disappoint, but the Mantis has nothing on my nomination from last year:
Seeing as I've already nominated the Jaguar this year, if someone want's to nominate the BWS, I will second.
I would normally nominate the most deadly Spider (in term of venom, The Brazilian Wandering Spider) but this year, after watching Planet Earth II. It HAS to be the Jaguar. Having the balls to hunt and kill Caiman's (a deadly predator in his own right) should see him challenge for the later rounds.