Bed bug

Found globally in human dwellings, typically nesting in cracks, crevices, mattress seams, and bedding near where people sleep.

Obligate hematophagous insects, meaning they feed exclusively on the blood of humans and other warm-blooded animals.

Primarily nocturnal; they hide during the day and emerge at night to feed. They undergo a hemimetabolous life cycle (egg, nymph, adult) and require a blood meal to progress through each stage.

Risk: Causes itchy, red welts from bites and can lead to secondary skin infections or psychological distress (insomnia, anxiety). They are not known to transmit diseases to humans. Benefits: None; they are considered a significant household pest.