Bug Identifier
Bird Mite
Community identification

Bird Mite

Ornithonyssus sylviarum / Dermanyssus gallinae

Order & Family
Order: Mesostigmata; Family: Macronyssidae / Dermanyssidae
Size
0.5 mm to 1.0 mm (barely visible to the naked eye as a moving speck)
See this bug in the Encyclopedia

Natural Habitat

Bird nests, poultry houses, and occasionally residential homes via vents, eaves, or attics where birds nest.

Diet & Feeding

Hematophagous (blood-feeding); primarily parasitizes birds but will bite humans and other mammals if their primary hosts leave the nest.

Behavior Patterns

They are highly active crawlers that migrate away from abandoned nests in search of a new host; they are most active during the spring and early summer.

Risks & Benefits

Risks include intense itching, skin irritation, and dermatitis in humans. They cannot survive long-term on human blood and do not typically transmit diseases to humans, but can be a significant nuisance and source of stress.