Bed Bug (Nymph or Cast Skin)

Indoor environments, particularly near sleeping areas such as mattresses, box springs, crevices in furniture, and behind headboards.

Hematophagous (feeds exclusively on the blood of warm-blooded animals, primarily humans).

Nocturnal and cryptic; they hide during the day in tight cracks and crevices and emerge at night to feed. They are attracted to carbon dioxide and body heat.

Risks: Their bites cause itchy welts, allergic reactions, anxiety, and insomnia in humans. They are notorious pests that are difficult and expensive to exterminate. Benefits: None known for humans or household ecosystems.