Why do humans accuse mosquitoes of killing people? No human has ever been killed by a mosquito or even a swarm of mosquitoes. A correct statement would be that people are killed by mosquito borne diseases. Mosquitoes and their larva are an important food for thousands of species of insects, fish, amphibians, reptiles, birds, and mammals. Some of these mosquito eaters couldn't get through the initial part of their life without the tiny just hatched mosquito larva for a first food.