Bird Mite

Scientific Name: Ornithonyssus sylviarum / Dermanyssus gallinae

Order & Family: Order: Mesostigmata; Family: Macronyssidae or Dermanyssidae

Size: 0.5 mm to 1.0 mm (visible as a tiny moving speck)

Bird Mite

Natural Habitat

Found in bird nests (pigeons, starlings, sparrows) and poultry houses; often enters homes through windows or vents when birds leave the nest.

Diet & Feeding

Blood of birds (primary host); they may bite humans if the bird host is unavailable, though they cannot survive long on human blood.

Behavior Patterns

Active mostly at night; they reproduce rapidly in warm conditions. They crawl in search of hosts and are often found on windowsills, bedding, or near vents.

Risks & Benefits

Risks: Can cause intense itching and skin irritation (dermatitis) in humans. Benefits: None to humans; they are considered a parasitic pest.

Identified on: 2/13/2026