Bed Bug Nymph

Scientific Name: Cimex lectularius

Order & Family: Hemiptera / Cimicidae

Size: 1.5 mm to 4.5 mm (depending on life stage; nymphs start out translucent and very small).

Bed Bug Nymph

Natural Habitat

Found primarily in human dwellings, typically hiding in mattress seams, bed frames, cracks, crevices, and behind wallpaper in close proximity to sleeping areas.

Diet & Feeding

Obligate hematophages; they feed exclusively on the blood of warm-blooded animals, with a strong preference for humans.

Behavior Patterns

Nymphs must feed once before molting into the next stage. They are nocturnal, photophobic, and attracted to carbon dioxide and body heat radiated by hosts during sleep.

Risks & Benefits

Risks include itchy allergic reactions, skin rashes, psychological distress, and secondary infections from scratching. They are not known to transmit diseases to humans. There are no known benefits to the ecosystem.

Identified on: 1/2/2026