The horsefly is an insect belonging to the family Tabanidae of Diptera. Adults are bigger than ordinary flies, with big heads and fine hairs on their bodies, like bees. Mouth degenerates, does not eat food, and mainly lives on the blood of mammals. Living in the wild. Eggs are laid on the hair of horses, donkeys, mules, etc. The hatched larvae are brought into the body when the animals lick their hair and parasitize in the stomach. In the larval stage, it parasitizes animals and sometimes humans.
Horse flies are also found in China. Guangxi and Yunnan in China are suitable for the growth of horseflies.