8. Mosquito
Source: Iconosquare
Truly, the most deadly animal on the planet, mosquitoes kill more than 2 million people each year. There are more than 2,000 species of mosquito and 60% are dangerous to humans. Female mosquitoes take mammalian blood and deliver it to their young. When they bite, they often transmit diseases like Malaria, which can lead to a slow agonizing death if left untreated.