There are bugs flying on the wall.

Does the subject want to ask "what bugs are flying on the wall?" Moths and flies.

1, moth: moth is an insect that feeds on cellulose and exists in wallpaper, furniture and wood products. If there are tiny holes or moth-eaten marks on the wallpaper, it is a sign of moth activity.

2. Flying insects: Sometimes there are some small flying insects on the wallpaper. These flying insects enter the living environment to look for food or water, and feed on fibrous substances, and the wall covering just meets their foraging conditions.