Bryan McAllister’s personal reference notebook
July 30, 2026Short & citedBlog
Civic Viewpoint.
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Kept by Bryan McAllister — short guides, clear facts, and the Canadian angle when it matters.
Field Notes • Insect

Weevil

Weevils are a large group of beetles in the superfamily Curculionoidea, best known for their elongated snouts.

Updated July 30, 20261 min readCited sources

Weevils are beetles in the superfamily Curculionoidea, distinguished by their elongated snouts. Many species are plant pests that damage crops and stored grain.

What is a weevil?

Weevils belong to the beetle order Coleoptera and are placed in the superfamily Curculionoidea. They are usually small beetles with a distinctive elongated snout, elbowed antennae, and a compact, often pear-shaped body. The best-known family is Curculionidae, the true weevils.

Why are they considered pests?

Most weevils feed on plants, roots, seeds, or grain. Some species develop inside seeds or grain kernels, which makes them significant agricultural pests. They can reduce crop yields or contaminate stored food products. They are generally not harmful to humans or pets.

Where are they found?

Weevils occur worldwide in a wide range of habitats. Published estimates place known diversity at roughly 90,000 to 97,000 described species, making them one of the most diverse animal groups. In Canada, some species infest cereal grains and stored food.

In short

  • Weevils are beetles, not a separate insect order.
  • Their long snout is a defining feature.
  • Many are agricultural or stored-food pests.
  • They are harmless to humans and pets.
Canadian angle

Weevils are relevant to Canadian agriculture and households because some species infest cereal grains, stored food, and crops, and can be managed as nuisance or pest insects in homes and farm settings.[2][10]

Quick questions

What is a weevil?
A weevil is a beetle in the superfamily Curculionoidea, usually recognized by its long snout.
Do weevils harm people?
Weevils are generally not harmful to people or pets; they do not bite or sting, but some species damage crops and stored food.
How many species of weevils are there?
Estimates vary by source, but published figures range from about 40,000 species in Curculionidae to roughly 90,000–97,000 described weevil species overall.

Sources

  1. Encyclopaedia Britannica — https://www.britannica.com/animal/weevil
    Supports: Weevils as beetles in Curculionidae; family size and classification.
  2. WebMD — https://www.webmd.com/a-to-z-guides/weevils-what-to-know
    Supports: Physical description, diet, pest status, and lack of harm to humans/pets.
  3. Critter Science — https://critter.science/the-weevil/
    Supports: Global distribution, habitat breadth, and IUCN status range.
  4. Bug Under Glass — https://bugunderglass.com/weevil/
    Supports: Superfamily Curculionoidea and approximate species diversity.
  5. Missouri Department of Conservation — https://www.mdc.mo.gov/discover-nature/field-guide/weevils-snout-beetles-bark-beetles
    Supports: Snout, antennae, and plant-feeding beetle identification.
  6. University of Minnesota Extension — https://www.extension.umn.edu/nuisance-insects/home-invading-weevils
    Supports: Indoor occurrence, non-harmful status, and nuisance management context.
  7. Wikipedia — https://en.wikipedia.org/wiki/Weevil
    Supports: General overview and species estimate; used only where consistent with other sources.