What is this?
The picture is too small for a species ID, but it looks like one of the pantry pests that attack grain products, flours, dry mixes, breads, cookies, chocolates and other sweets, and spices. Non-food material includes wool, hair, leather, horn, and museum specimens.
If you go through your pantry, you will probably find one or two products infested. Tossing them should solve your problem.