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Carnivorous plant

Carnivorous plants are plants that attract, trap, kill, and digest animal prey, usually insects, to supplement nutrients obtained from poor soils.

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

Carnivorous plants are a group of plants that have adapted to capture, digest, and absorb nutrients from animal prey, typically insects, to supplement growth in nutrient-poor environments. These plants occur in many habitats, especially wet, low-nutrient areas such as bogs and swamps, and include well-known groups such as sundews, pitcher plants, butterworts, bladderworts, and the Venus flytrap. More than 600 species are known, and carnivory has evolved independently multiple times across flowering plant lineages.

Definition and traits

Carnivorous plants are defined by their ability to attract, trap, digest, and absorb nutrients from prey. Botanical sources describe them as plants that use prey-derived nutrients to supplement growth, especially in low-nutrient conditions. Most species still photosynthesize and use prey mainly to supplement nutrients such as nitrogen and phosphorus.

Trapping mechanisms

Carnivorous plants use a range of specialized traps, including sticky leaves, snap traps, pitfall traps, bladder traps, and suction traps. These mechanisms help capture insects and other small organisms. The traps may be adhesive, snap, pitfall, suction, or other specialized structures.

Habitat and ecology

These plants are most often associated with wet, acidic, or nutrient-poor habitats such as bogs, swamps, and some aquatic environments. Their carnivory is an adaptation to environments where essential nutrients are scarce. They are adapted to nutrient-poor habitats where soil minerals are limited.

Diversity and evolution

More than 600 species of carnivorous plants are known, and carnivory has evolved independently several times in different plant lineages. Major groups include sundews, pitcher plants, butterworts, bladderworts, and the Venus flytrap. Carnivory has evolved independently multiple times in flowering plants.

Key facts

  • Carnivorous plants obtain some nutrients by digesting animals rather than relying only on roots.
  • Their traps may be adhesive, snap, pitfall, suction, or other specialized structures.
  • Most species still photosynthesize and use prey mainly to supplement nutrients such as nitrogen and phosphorus.
  • They are adapted to nutrient-poor habitats where soil minerals are limited.
  • Carnivory has evolved independently multiple times in flowering plants.
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Canadian context

Carnivorous plants are of interest to Canadian botanists, gardeners, and nature educators, and several species are studied or cultivated in Canadian collections and botanical settings.

Frequently asked questions

What is a carnivorous plant?
A plant that captures, digests, and absorbs nutrients from animal prey, usually insects.
Why do carnivorous plants eat animals?
They live in habitats where the soil lacks nutrients such as nitrogen, so prey provides a supplemental source.
Are carnivorous plants fully dependent on prey?
No. Most still photosynthesize and can grow without prey, but they grow better with prey-derived nutrients.
What are the main kinds of carnivorous plants?
Common groups include sundews, pitcher plants, butterworts, bladderworts, and the Venus flytrap.
How many species of carnivorous plants are there?
Sources in the search results report more than 600 species, with some estimates higher depending on classification.

References

  1. Encyclopaedia Britannicahttps://www.britannica.com/plant/carnivorous-plant
    Supports: Definition, diversity, and independent evolution of carnivory
  2. International Carnivorous Plant Societyhttps://www.carnivorousplants.org/cp/carnivory/what
    Supports: Defining traits, prey capture, digestion, and nutrient benefit
  3. Royal Botanic Gardens, Kewhttps://www.kew.org/read-and-watch/carnivorous-plants
    Supports: Low-nutrient habitats and examples of trapping methods
  4. Encyclopedia.comhttps://www.encyclopedia.com/plants-and-animals/plants/plants/carnivorous-plants
    Supports: General definition, major groups, and species count
  5. United States Botanic Gardenhttps://www.usbg.gov/gardens-plants/cultivating-carnivorous-plants
    Supports: Species diversity, representative genera, and trap types