Jumping spiders and those big anime eyes.
Edit: One time, I was at my in-laws' house and there was this bigass fly none of us could swat. Little shit legit dodged a fly swatter. But I spotted a zebra jumping spider hanging out in the window. So I ended up herding annoying!fly into that window, and suddenly BAM. Spider fren got a meal the size of herself, and we had no more annoying fly. Teamwork.