Bed Bug Nymph
Scientific Name: Cimex lectularius
Order & Family: Hemiptera / Cimicidae
Size: 1.5 mm to 4.5 mm (depending on life stage/instar)

Natural Habitat
Human dwellings, specifically in sleeping areas, cracks, crevices, mattress seams, and upholstered furniture.
Diet & Feeding
Obligate hematophages; they feed exclusively on the blood of warm-blooded animals, primarily humans.
Behavior Patterns
Nocturnal and elusive. They undergo five nymphal stages (instars) and require a blood meal to molt into the next stage. They are attracted to carbon dioxide and body heat.
Risks & Benefits
Risks include itchy skin welts, allergic reactions, and psychological distress/insomnia. While they are not known to transmit diseases to humans, infestations are difficult and costly to eradicate. They provide no known ecosystem benefits in domestic environments.
Identified on: 4/20/2026