Bed bug (likely a recently fed nymph)

Beds, upholstered furniture, mattress seams, cracks, and other sheltered indoor spaces near sleeping hosts.

Feeds exclusively on blood, primarily from humans and occasionally other warm-blooded animals. It pierces skin with specialized mouthparts and typically feeds at night.

Nocturnal and secretive, hiding in crevices during daylight; females lay eggs in protected locations, and nymphs molt through five stages. They can survive for months without feeding.

Bites cause itchy, localized welts and may trigger allergic reactions, but bed bugs are not established vectors of disease. They provide little ecological benefit indoors and are difficult, costly pests to eradicate.