Bird Mite (or Tropical Rat Mite)
Scientific Name: Ornithonyssus spp. (likely Ornithonyssus sylviarum or O. bacoti)
Order & Family: Order: Mesostigmata; Family: Macronyssidae
Size: 0.5 to 1.0 mm (extremely small, barely visible to the naked eye)
Natural Habitat
Commonly found in bird nests (sparrows, pigeons, starlings) or rat burrows, often migrating into human living spaces when the primary host leaves.
Diet & Feeding
Blood from host animals; they are hematophagous and will bite humans if their primary hosts are unavailable.
Behavior Patterns
Highly mobile and active pests that search for a blood meal once a host nest is abandoned; they do not fly or jump but crawl rapidly; they cannot complete their life cycle on human blood alone.
Risks & Benefits
Cause intense itching and redness through bites; can lead to dermatitis and secondary infections from scratching; they do not typically transmit diseases to humans but are significant household nuisances.
Identified on: 6/8/2026