Beaver
Beavers are large, semiaquatic rodents in the genus *Castor*.
Beavers are large, semiaquatic rodents in the genus *Castor*, best known for cutting trees and building dams, lodges, and canals in freshwater habitats.
What it is
Beavers are the largest rodents in North America and Eurasia. They have stocky bodies, short legs, webbed hind feet, and a broad flat tail. Two living species exist: the North American beaver (*Castor canadensis*) and the Eurasian beaver (*Castor fiber*). They are herbivores, feeding mainly on bark, twigs, leaves, stems, roots, and aquatic plants.
Why it matters
Beavers are ecosystem engineers. By building dams, they slow water flow, create ponds, and maintain water levels that protect lodges and food stores. This activity benefits many other species and shapes freshwater habitats. In Canada, beavers are widespread and culturally significant, though they are not endangered.
Key details
North American beavers typically live 10–12 years in the wild. Both living species are listed as Least Concern by the IUCN. Beavers prefer freshwater wetlands with woody vegetation like willow, aspen, poplar, birch, and maple. Their populations have rebounded after historical declines from trapping and habitat loss.
In short
- Beavers are the largest rodents in North America and Eurasia.
- They build dams to manage water levels and create safe ponds.
- Diet consists of bark, twigs, leaves, and aquatic plants.
- Both species are Least Concern and not endangered in Canada.
Beavers are strongly associated with Canada and are widespread across Canadian freshwater ecosystems. They are also an important cultural symbol and an ecologically significant native species in the country.[1][6][14]
Quick questions
What is a beaver?
Why do beavers build dams?
Are beavers endangered in Canada?
Sources
- Smithsonian's National Zoo & Conservation Biology Institute — https://nationalzoo.si.edu/animals/beaverSupports: Habitat, diet, lifespan, and ecological role of beavers.
- Oakland Institute / OAEC — https://oaec.org/our-work/water-institute/beaver-home/beaver-facts/Supports: Two species of beaver, native range, and lifespan in the wild.
- Trout Unlimited / Wild Trout — https://www.wildtrout.org/content/beaver-factsSupports: Habitats and reason beavers build dams.
- World Wide Fund for Nature UK — https://www.wwf.org.uk/learn/fascinating-facts/beaversSupports: Physical description, habitat, diet, and conservation context.
- National Geographic — https://www.nationalgeographic.com/animals/mammals/facts/beaverSupports: Diet, lifespan, size, and conservation status.
- PBS Nature — https://www.pbs.org/wnet/nature/blog/beaver-fact-sheet/Supports: Two species, Canadian range, lifespan, and conservation status.
- Chattahoochee Nature Center — https://chattnaturecenter.org/visit/experience/wildlife/animal-facts/beaver/Supports: Diet and purpose of dams.
- Encyclopaedia Britannica — https://www.britannica.com/animal/beaverSupports: General definition, habitat, dam building, and range history.