Chrysops is a genus of flies commonly known as deer flies. These insects are part of the family Tabanidae and are typically found in warm, sunny environments. They are characterized by their large, bulging eyes and distinctive patterns on their wings. Deer flies are known for their painful bites, which they use to feed on the blood of mammals, including humans. These flies are most active during the summer months and are often seen near water sources, where they breed. Chrysops species play a role in the ecosystem as pollinators, but their bites can be a nuisance to outdoor enthusiasts and livestock.