Bed bug

Primarily human dwellings, especially bedrooms; they hide in cracks and crevices of mattresses, bed frames, furniture, walls, and flooring during the day and emerge at night to feed.

Exclusively blood of warm-blooded animals, primarily humans. Nymphs and adults feed by piercing the skin and sucking blood.

Nocturnal, cryptic (hide during the day), and aggregate in harborage areas. They are attracted to carbon dioxide and body heat. They can survive for several months without feeding.

Potential risks include itchy red welts from bites, allergic reactions, secondary skin infections from scratching, and psychological distress. They are not known to transmit diseases to humans. There are no known benefits.