Bug Identifier
Bird Mite
Community identification

Bird Mite

Ornithonyssus sylviarum / Dermanyssus gallinae

Order & Family
Order: Mesostigmata; Family: Macronyssidae or Dermanyssidae
Size
0.5 mm to 1.0 mm (hard to see without magnification)
See this bug in the Encyclopedia

Natural Habitat

Found in bird nests (pigeons, starlings, sparrows) and poultry houses; often moves into human dwellings if bird hosts leave.

Diet & Feeding

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

Behavior Patterns

Active hunters that are most active at night; they have a rapid life cycle (approx. 7 days) and can survive for several weeks without a host.

Risks & Benefits

While they cannot survive long-term on human blood, their bites cause intense itching, red welts, and dermatitis. They do not typically transmit diseases to humans but are significant pests in the poultry industry.