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Science & Nature • Insect

Butterfly

A butterfly is a winged insect in the order Lepidoptera, usually active during the day and known for its scaled wings and complete metamorphosis.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

A butterfly is a winged insect in the order Lepidoptera, usually active during the day and known for its scaled wings and complete metamorphosis. Butterflies occur nearly worldwide and include many species that are important pollinators and part of terrestrial food webs. In Canada, butterflies are found across the country and are commonly encountered in gardens, parks, and conservation areas.

Definition and classification

Butterflies are winged insects in the order Lepidoptera, typically placed in the superfamily Papilionoidea. Some classifications also include related groups such as skippers and, in broader treatments, the Hedyloidea. Approximately 17,500 species are known worldwide, making butterflies one of the most recognized insect groups.

Life cycle

Butterflies undergo complete metamorphosis, passing through four distinct life stages: egg, larva (caterpillar), pupa (chrysalis), and adult. The larval stage is focused on feeding and growth, while the adult stage is primarily for reproduction and, in many species, feeding on nectar.

Physical characteristics

Butterflies typically have scaled wings, club-tipped antennae, and a characteristic daytime flight pattern. Their wing colours may arise from pigments or structural coloration, contributing to the wide variety of patterns seen across species.

Ecology and distribution

Butterflies are found on most continents wherever suitable host plants are available, with the highest diversity in tropical regions. They interact closely with flowering plants as pollinators and serve as both prey and consumers within local food webs, making them ecologically significant.

Human interest and study

Butterflies are among the best-known insects due to their colours, visibility, and role in nature study. They are commonly featured in identification guides, natural history collections, and conservation efforts, and are a frequent subject of biodiversity and pollinator discussions in Canada.

Key facts

  • Butterflies are insects in the order Lepidoptera with scaled wings and complete metamorphosis.
  • They have four life stages: egg, larva, pupa, and adult.
  • Butterflies are found nearly worldwide, especially diverse in tropical regions.
  • They are ecologically important as pollinators and as part of food webs.
  • Approximately 17,500 species are known worldwide.
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Canadian context

Butterflies are found across Canada, and Canadian readers often encounter them in gardens, parks, and conservation areas; they are also a common subject in biodiversity and pollinator discussions. For Canadian audiences, butterflies are relevant to native plant habitat, seasonal wildlife observation, and insect monitoring.

Frequently asked questions

What is a butterfly?
A butterfly is a day-flying lepidopteran insect with scaled wings, usually placed in the superfamily Papilionoidea.
How many stages are in a butterfly’s life cycle?
Four: egg, larva, pupa, and adult.
How many butterfly species are there?
About 17,500 species worldwide, according to the Smithsonian.
How are butterflies different from moths?
Butterflies are usually diurnal, often brightly coloured, and commonly rest with wings held upright, while moths are more often nocturnal and differ in body form and behaviour.
What do butterflies eat?
Larvae usually eat plant material, often specific host plants, and adults commonly feed on nectar or other liquid foods.
Why are butterflies important?
They contribute to pollination and are part of many food webs, making them ecologically significant.

References

  1. Encyclopaedia Britannica — https://www.britannica.com/animal/butterfly-insect
    Supports: Definition, classification, life cycle, distribution, and ecological importance of butterflies.
  2. Smithsonian Institution — https://www.si.edu/spotlight/buginfo/butterfly
    Supports: Estimated number of species, distinctive characteristics, and classification information.
  3. Wikipedia — https://www.wikipedia.org/wiki/Butterfly
    Supports: General background on anatomy, metamorphosis, colouration, and fossil history; used cautiously as a secondary reference.
  4. Butterfly Atlas — https://butterfly-atlas.ru/en/entsiklopediya
    Supports: General educational overview of butterfly biology, life cycle, feeding, and differences from moths.
  5. Google Books — https://books.google.com/books/about/The_Illustrated_Encyclopedia_of_the_Butt.html?id=n7ZFAAAAYAAJ
    Supports: Reference to an illustrated encyclopedia covering evolution, history, structure, classification, and habitats.
  6. American Museum of Natural History — https://shop.amnh.org/butterflies-mini-encyclopedia
    Supports: Butterflies as a natural history subject and their relation to Lepidoptera.