Horse-flies and deer flies are true flies in the family Tabanidae. The adults are often large and agile in flight. Only female horseflies bite land vertebrates, including humans, to obtain blood. They prefer to fly in sunlight, avoiding dark and shady areas, and are inactive at night. They are found all over the world. Eye | Ugliness | Nature | Animal Wildlife | Horizontal

High Resolution JPEG Picture of Horse-flies and deer flies are true flies in the family Tabanidae. The adults are often large and agile in flight. Only female horseflies bite land vertebrates, including humans, to obtain blood. They prefer to fly in sunlight, avoiding dark and shady areas, and are inactive at night. They are found all over the world. [1548475368] stock photo