Bed Bug

Indoor environments, predominantly in cracks and crevices near sleeping areas (beds, furniture, baseboards).

Obligate hematophagous (feeds exclusively on blood, primarily human blood).

Nicticoreal (active at night); they use heat and CO2 to locate hosts. They undergo incomplete metamorphosis (eggs, five nymphal stages, and adult).

Risks include itchy skin welts, allergic reactions, insomnia, and psychological distress. While they do not transmit pathogens, they are a significant nuisance pest. No known ecological benefits in human habitats.