The Horse Botfly is a parasitic insect that primarily affects horses. Its larvae develop inside the horse's stomach and intestines after the adult flies lay eggs on the horse's coat. These larvae can cause discomfort and digestive issues for the horse. Adult Horse Botflies are large, hairy flies that resemble bumblebees. They are typically active during warm months and are known for their distinctive yellow or black coloration. Controlling their population is important for maintaining the health of horses, as infestations can lead to serious health problems.