Bug Identifier
Bird Mite or Rodent Mite
Community identification

Bird Mite or Rodent Mite

Ornithonyssus sylviarum / Ornithonyssus bacoti

Order & Family
Order: Mesostigmata; Family: Macronyssidae
Size
0.5 mm to 1.0 mm (very tiny, about the size of a pinhead)
See this bug in the Encyclopedia

Natural Habitat

Nests of birds or rodents; frequently enter homes through vents, attics, or wall voids if host nests are abandoned.

Diet & Feeding

Obligate hematophages; they feed on the blood of birds or rodents, but will bite humans if their primary host is unavailable.

Behavior Patterns

Active crawlers that move rapidly; they cannot fly or jump. They are primarily nocturnal and seek out heat and carbon dioxide to find hosts.

Risks & Benefits

Risks include intense itching, skin irritation, and dermatitis from bites. They do not typically survive long or reproduce on human blood. No major ecosystem benefits in human dwellings.