Bed bug

Indoors, hiding in mattress seams, bed frames, furniture, and cracks near sleeping areas.

Feeds on blood, usually from humans; nymphs also require blood meals to develop.

Flat, reddish-brown, wingless, and mostly active at night; hides in crevices and can persist for months without feeding.

Bites can cause itchy skin reactions and disturbed sleep, but bed bugs are not known to transmit disease. The photo is too blurry for a confident identification.