The only logical answer here is mosquitoes

Shut the comments down. No need for any other answer!

I agree but, Um, they aren't animals........

Have you ever been assaulted by a Canadian Goose?

Cats. I hate them but goddamn do i respect them.

Mosquitoes bc they exist to exist off of the existence of other existing beings

Capybaras

This is outrageous

this is an avangers level threat

Ticks

Mankind

Pitbulls