These things appeared in friends flat. What are they?
Yes, it is. If they’re in a flat, probably flour moths. Your friend should check any containers with food, especially grains.
Do yourself a favor and throw out all other food ad well, unless it’s completely sealed off. Their eggs take a while to hatch, so you don’t want to see them pop up again in a month.
Then clean the entire kitchen with a spray of vinegar and water. Pay extra attention to corners, crevices, and places like screws. Their eggs are tiny.
You can also get a pheromone trap to avoid them spreading further.