Likely black soldier fly larva (dark prepupa)

Compost, decaying plant matter, manure, and other moist organic waste; prepupae may wander onto nearby dry surfaces.

Larvae consume decomposing organic material; the dark prepupal stage largely stops feeding.

Larvae develop in groups in moist waste, then darken and leave the food source to pupate in a drier place. The still image is too indistinct for confident identification.

Harmless to people and not a household pest; larvae efficiently recycle organic waste and can be used as animal feed.