trapping mechanism

References

trapping mechanism

botany

Written by

The Information Architects of Encyclopaedia Britannica

Last updated

July 21, 2026

Quick Summary

Carnivorous plants are a fascinating group of over 600 species that have evolved unique trapping mechanisms to supplement their nutrient intake. While they perform photosynthesis like other plants, they capture and digest insects and small animals to obtain essential nutrients like nitrogen, which are scarce in the poor soils they typically inhabit, such as bogs and wetlands.12

These plants employ a variety of trapping strategies:
* Pitfall traps: Pitcher plants lure prey into a cavity filled with digestive fluids.12
* Adhesive traps: Sundews and butterworts use sticky leaves to ensnare insects.12
* Snap traps: The Venus flytrap is famous for its rapid, hinged traps that close on unsuspecting prey. Aquatic bladderworts also use a suction trap mechanism.123

Despite their predatory nature, carnivorous plants are vulnerable to habitat loss and overcollection, with many species considered threatened or endangered.1

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

4 Britannica Sources

Ask Britannica AI about this topic

Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.

carnivorous plant
Trap types and digestion
The conspicuous trapping mechanism, which is always a modified leaf, draws special attention to these plants. A variety of trapping mechanisms exist and are designated as active or passive based on whether they move to capture prey. Pitfall traps, such as those found in pitcher plants, are…
Read More
The conspicuous trapping mechanism, which is always a modified leaf, draws special attention to these plants. A variety of trapping mechanisms exist and are designated as active or passive based on whether they move to capture prey. Pitfall traps, such as those found in pitcher plants, are…
Read More

cobra plant
…and uses its carnivorous pitfall traps to supplement its nutritional requirements in poor soil conditions. It thrives in redwood and red fir forests up to 2,000 metres (6,000 feet) above sea level, where temperatures remain below about 18 °C (65 °F).
Read More
…and uses its carnivorous pitfall traps to supplement its nutritional requirements in poor soil conditions. It thrives in redwood and red fir forests up to 2,000 metres (6,000 feet) above sea level, where temperatures remain below about 18 °C (65 °F).
Read More

Nepenthes
Physical description
… that function as passive pitfall traps. Attracted by nectar secreted from the underside of the trap’s lid, the prey often slip from the mouth of the pitcher into a pool of liquid at the bottom and are unable to escape, because of the pitcher’s downward-pointing hairs and slick sides. The…
Read More
… that function as passive pitfall traps. Attracted by nectar secreted from the underside of the trap’s lid, the prey often slip from the mouth of the pitcher into a pool of liquid at the bottom and are unable to escape, because of the pitcher’s downward-pointing hairs and slick sides. The…
Read More

pitcher plant
… that form a passive pitfall trap. Old World pitcher plants are members of the family Nepenthaceae (order Caryophyllales), while those of the New World belong to the family Sarraceniaceae (order Ericales). The Western Australian pitcher plant (Cephalotus follicularis) is the only species of the family Cephalotaceae (order Oxalidales
Read More
… that form a passive pitfall trap. Old World pitcher plants are members of the family Nepenthaceae (order Caryophyllales), while those of the New World belong to the family Sarraceniaceae (order Ericales). The Western Australian pitcher plant (Cephalotus follicularis) is the only species of the family Cephalotaceae (order Oxalidales
Read More