Bird Mite (or Rodent Mite)

Scientific Name: Ornithonyssus sylviarum / Dermanyssus gallinae

Order & Family: Order: Mesostigmata, Family: Macronyssidae / Dermanyssidae

Size: Extremely small, approximately 0.5 to 1.0 mm (about the size of a pinhead or a speck of moving dust).

Bird Mite (or Rodent Mite)

Natural Habitat

Typically found in bird nests (e.g., pigeons, starlings on buildings) or rodents' nests; they enter homes via vents, windows, or cracks when hosts leave.

Diet & Feeding

Strictly hematophagous (blood-feeders). They prefer birds or rodents but will bite humans if their primary host is unavailable.

Behavior Patterns

They are highly mobile, active during the day and night, and can proliferate rapidly. They do not live on humans but will crawl onto skin to explore and bite.

Risks & Benefits

Risks: Their bites cause intense itching, red welts, and skin irritation in humans. They do not generally transmit diseases to humans but can cause significant psychological distress and infestations. No known benefits.

Identified on: 4/9/2026