Bloodstain (likely from a crushed Bed Bug)

Found in human dwellings, specifically in mattresses, bed frames, headboards, and cracks or crevices near sleeping areas.

Obligate hematophagous (blood-feeding) insects that primarily feed on human blood during the night.

Nocturnal and elusive. They hide during the day and are attracted to the carbon dioxide and warmth produced by sleeping hosts. When crushed shortly after feeding, they leave distinctive reddish-brown blood smears.

Risks include itchy skin rashes, psychological distress, and potential allergic reactions. While they are not known to transmit diseases to humans, infestations are difficult and expensive to eradicate. No known ecosystem benefits in human environments.