Bird Mite (or Rodent Mite)
Ornithonyssus sylviarum (Northern fowl mite) or Dermanyssus gallinae (Red poultry mite)
- Order & Family
- Order Mesostigmata; Family Macronyssidae or Dermanyssidae
- Size
- Pinhead-sized, roughly 0.5 to 1.0 mm in length; they are barely visible to the naked eye.
Natural Habitat
Typically found in bird nests (on eaves, in chimneys, or window ledges) or nesting areas of rodents; they enter buildings when their hosts leave.
Diet & Feeding
Hematophagous (blood-feeders). They specifically feed on the blood of birds or rodents but will bite humans if their primary host is unavailable.
Behavior Patterns
They are highly mobile, active during the day or night depending on the species, and can crawl long distances into homes through cracks and vents once a host nest is abandoned.
Risks & Benefits
Risks: Their bites cause intense itching, skin irritation, and dermatitis in humans. While they cannot survive long or reproduce on human blood, they cause significant discomfort. Benefits: None to humans; they are considered household and agricultural pests.