According to multiple sources, the animal that kills the most humans per year is the mosquito. Mosquitoes can transmit life-threatening diseases like malaria and dengue, and the World Health Organization estimates that mosquitoes that carry these diseases kill 725,000 people a year. Other animals that are responsible for human deaths include humans themselves, with homicides accounting for an estimated 431,000 human deaths a year. Here is a list of the top 10 deadliest animals to humans worldwide, measured by the number of humans killed per year:
- Mosquitoes (~1,000,000 deaths)
- Humans (475,000 deaths)
- Snakes (50,000 deaths)
- Dogs (25,000 deaths)
- Tsetse flies (10,000 deaths)
- Assassin bugs (10,000 deaths)
- Freshwater snails (10,000 deaths)
- Scorpions (3,250 deaths)
- Ascaris roundworms (2,500 deaths)
- Crocodiles (1,000 deaths)
Its worth noting that different lists have varying criteria and definitions, so lists from different sources may disagree and can be contentious.