The head is mostly covered by the eyes. An eye is made up of hundreds of little facets. Most flies have green eyes. The male's eyes touch, but the female's are a tiny bit apart. The abdomen is the fly's stomach.
Horse flies can grow up to one inch long and have a wing span of two inches.
Large horse flies are gray or blackish. They use antennae to feel and smell. Flies' tongues are tube shaped and are used as a pump. The males drink nectar from flowers. When the females bite they suck the victims blood.