Bug Identifier
Horsefly
Community identification

Horsefly

Tabanus spp.

Order & Family
Order: Diptera, Family: Tabanidae
Size
10 mm to 25 mm (0.4 to 1.0 inch)
See this bug in the Encyclopedia

Natural Habitat

Near wetlands, ponds, streams, and pastures where moisture is abundant for larvae development.

Diet & Feeding

Adult females feed on vertebrate blood (including humans and livestock) for egg development, while males and non-breeding females feed primarily on nectar and plant sap.

Behavior Patterns

Active during the day and particularly attracted to movement, warmth, dark colors, and carbon dioxide. Females deliver painful bites using scissor-like mouthparts.

Risks & Benefits

Risks include painful bites that can cause irritation, allergic reactions, and the potential transmission of certain animal diseases (such as swamp fever). Benefits are minimal, though they serve as food for birds and larger predators.