Bed bug

Indoor environments, primarily cracks and crevices near sleeping or resting areas, such as mattresses, bed frames, and furniture.

Obligate blood-feeders, primarily consuming human blood; they will also feed on other warm-blooded animals if humans are unavailable.

Nocturnal and elusive; they use heat and carbon dioxide to locate hosts, feed for 3–10 minutes, and then retreat to hide. They undergo hemimetabolous metamorphosis (egg, nymph, adult).

Risks include itchy allergic reactions, skin rashes, and psychological distress (anxiety/insomnia). While they can harbor pathogens, they are not known to transmit diseases to humans. They provide no ecological benefits in domestic settings.