What is an ill-fated animal?

The ill-fated animals are mosquitoes, because mosquitoes mostly feed on humans, and they are most likely to die. And humans have invented many things to deal with mosquitoes, such as electric mosquito coils and mosquito killer.

Extension: Mosquitoes, belonging to Insecta Diptera, have about 3,000 species all over the world. It is a tiny flying insect with a piercing and sucking mouthparts. Usually females suck blood, while males suck the juice of plants. Blood-sucking female mosquitoes are intermediate hosts of pathogens such as dengue fever, malaria, yellow fever, filariasis and Japanese encephalitis. Mosquitoes are distributed on all continents except Antarctica. The most famous ones are Anopheles, Aedes and Culex.