Bug Identifier
Bird Mite
Community identification

Bird Mite

Ornithonyssus sylviarum

Order & Family
Order Mesostigmata; Family Macronyssidae
Size
0.5 mm to 1.0 mm (barely visible to the naked eye)
See this bug in the Encyclopedia

Natural Habitat

Typically found in bird nests (sparrows, starlings, pigeons) or poultry houses; they may enter homes when birds leave the nest.

Diet & Feeding

Parasitic blood-feeders. They primarily feed on the blood of birds but will bite humans and other mammals if their primary host is unavailable.

Behavior Patterns

They are highly mobile and phototactic. They complete their life cycle quickly (often within 7 days) and tend to leave nests in large numbers once the fledgling birds fly away.

Risks & Benefits

Risks include intense itching, skin irritation, and red welts (dermatitis) in humans. They do not generally transmit diseases to humans but can cause significant stress/anemia in poultry. No major ecosystem benefits.