Cimex lectularius nymph

Scientific Name: Cimex lectularius

Order & Family: Hemiptera, Cimicidae

Size: 1.5mm to 4.5mm (nymph stages)

Cimex lectularius nymph

Natural Habitat

Commonly found in residential dwellings, hotels, and furniture, specifically within cracks, crevices, and mattresses near host sleeping areas.

Diet & Feeding

Obligate hematophage, feeding exclusively on the blood of warm-blooded animals, primarily humans.

Behavior Patterns

Thigmotactic and nocturnal; they remain hidden during the day and emerge at night to feed. Nymphs require a blood meal to progress through each of their five molting stages.

Risks & Benefits

A significant urban pest that causes skin irritation, psychological distress, and allergic reactions from bites. They do not typically transmit diseases but are difficult and expensive to eradicate.

Identified on: 1/18/2026