Bed Bug (Nymph)

Scientific Name: Cimex lectularius

Order & Family: Order: Hemiptera, Family: Cimicidae

Size: 1.5 mm to 4.5 mm (nymphs are smaller and translucent/yellowish, turning reddish after feeding).

Bed Bug (Nymph)

Natural Habitat

Human dwellings, specifically cracks and crevices near sleeping areas such as mattresses, bed frames, and headboards.

Diet & Feeding

Obligate hematophages; they feed exclusively on the blood of warm-blooded animals, primarily humans. The reddish color in the image indicates a recent blood meal.

Behavior Patterns

Nocturnal and elusive. They undergo hemimetabolous metamorphosis (egg, nymph, adult). Nymphs must have a blood meal to molt into the next stage.

Risks & Benefits

Risks include itchy skin rashes, psychological distress, and allergic reactions. They are not known to transmit diseases to humans. There are no ecological benefits in a domestic human setting.

Identified on: 3/13/2026