Bed bug

Human dwellings, primarily found in cracks and crevices in beds, furniture, and luggage.

Obligate hematophagous (blood-feeders), primarily feeding on human blood but will feed on other mammals or birds if necessary.

Mainly nocturnal; they hide during the day and emerge at night to feed. They are attracted to body heat and carbon dioxide. They undergo incomplete metamorphosis (egg, nymph, adult).

Risks include itchy skin rashes, psychological distress, and allergic reactions; they are a major pest nuisance. They are not known to transmit diseases to humans. They provide no significant benefits to the ecosystem or humans.