Bed bug

Hides near sleeping areas—in mattress seams, bed frames, furniture, and wall cracks—and is commonly found in homes, hotels, and other buildings.

Feeds on blood, usually from humans, using piercing-sucking mouthparts.

Flat, wingless, reddish-brown adults hide by day and feed mainly at night; they can survive for months without feeding and spread by hitchhiking in belongings.

Bites can cause itchy skin reactions and disturbed sleep, but bed bugs are not known to transmit disease. They provide no meaningful household benefit.