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Ant

Ants are eusocial insects in the family Formicidae, within the order Hymenoptera.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 27, 2026|2 min read| Fact-checked

Ants are eusocial insects in the family Formicidae, within the order Hymenoptera. They live in colonies with division of labour, usually including queens, workers, and males, and occur in diverse habitats worldwide except the polar regions.

Taxonomy

Ants belong to the insect order Hymenoptera and the family Formicidae. The provided sources note historical or alternate classifications in some references, but modern descriptions consistently place ants within Formicidae.

Social organization

Ants are known for eusocial colonies with castes that divide labour. Colonies typically include workers, one or more queens, and males, and some species form very large or highly complex colonies.

Distribution and habitat

Ants are cosmopolitan insects found on nearly all landmasses. The sources describe them as present from colder regions to tropical environments, with absence from the polar regions.

Ecological role

Ants are described as major ecological actors because they hunt other small arthropods, disperse plant seeds, and move and aerate soil. These activities can affect ecosystem structure and functioning.

Anatomy and life cycle

Ants are small insects with a segmented body and antennae, and most workers are wingless while reproductive males and future queens may have wings. Like other insects, they undergo metamorphosis.

Key facts

  • Ants are eusocial insects in the family Formicidae, order Hymenoptera.
  • They live in colonies with queens, workers, and males.
  • Ants are found worldwide except in polar regions.
  • They play important ecological roles such as predation, seed dispersal, and soil aeration.
  • The number of described ant species ranges from about 9,500 to more than 16,600.
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Canadian context

Ants are common across Canada and are a familiar part of Canadian ecosystems, gardens, and forests. Canadian readers may also encounter native species as well as introduced ants in homes and urban areas.

Frequently asked questions

What is an ant?
An ant is a small eusocial insect in the family Formicidae and the order Hymenoptera.
Do ants live alone or in colonies?
Ants live in organized colonies, often in nests or anthills, with different roles for workers, queens, and males.
Where do ants live?
Ants are found worldwide in many habitats, including cold and tropical regions, but not in the polar regions.
Why are ants important to ecosystems?
They help control other arthropods, disperse seeds, and aerate soil, which supports terrestrial ecosystems.
How many ant species are known?
The provided sources give different counts, ranging from about 9,500 to more than 16,600 described species.

References

  1. Vikidiahttps://fr.vikidia.org/wiki/Fourmi
    Supports: Family Formicidae, Hymenoptera classification, estimated number of species, global distribution except poles.
  2. Encyclopaedia Universalishttps://www.universalis.fr/encyclopedie/fourmi/
    Supports: Social organization, castes, ecological role, worldwide distribution, species estimate.
  3. Wikipediahttps://fr.wikipedia.org/wiki/Fourmi
    Supports: Eusocial colonies, supercolonies, global distribution, species count.
  4. Dictionnaire de l'Académie françaisehttps://www.dictionnaire-academie.fr/article/A9F1424
    Supports: Definition of ant as an insect that lives in society, queen as fertile female.
  5. Usitohttps://usito.usherbrooke.ca/d%C3%A9finitions/fourmi
    Supports: Physical description, colony structure, wingless workers and reproductive castes.
  6. Wikisourcehttps://fr.wikisource.org/wiki/L%E2%80%99Encyclop%C3%A9die/1re_%C3%A9dition/FOURMI
    Supports: Historical description of ants as insects that live in society and undergo transformations.
  7. Wikipediahttps://fr.wikipedia.org/wiki/Fourmili%C3%A8re
    Supports: Definition and purpose of the ant nest or anthill.
  8. Espace pour la viehttps://espacepourlavie.ca/les-fourmis-la-vie-en-societe
    Supports: Three castes, social organization, colony benefits.