For other uses, see Weevil (disambiguation) . A weevil is a type of beetle from the Curculionoidea superfamily. They are usually small, less than 6 mm (0.24 in), and herbivorous. Over 60,000 species are in several families, mostly in the family Curculionidae (the true weevils).eevils are often found in warm-weather areas, but do survive in colder areas if they have already infested the food. Weevils are often found in dry foods including nuts, seeds, cereal, and grain products, such as pancake mix.