Bats

Bats may just be the filthiest creatures on this planet, in terms of the many life-threatening diseases that they carry and transmit to humans.Bats carry over 60 viruses that can infect humans. This number heavily exceeds the number of viruses rodents contain. While bats are not as aggressive as other invasive species, they do bite. Bats can potentially carry rabies, a debilitating nerve disorder that affects the brain.
Brown Recluse Spider

Brown recluse spiders are unique insects. They are brown, timid spiders who go out of their way to entirely avoid humans and other species.Furthermore, Brown recluse spiders are specifically adapted to living in dark places, normally porches, sheds, old boxes, trash cans, and junk in no particular order.
Although, for the most part, Brown recluse spiders will retreat at the sight of a human, many times we typically are not aware of their presence. This can be fatal because most times when we notice them, they already are threatened and attack immediately. The brown recluse has a devastating bite, which can be fatal to humans if they do not get treatment right away.