Beaver vs. Lemming

Attribute	Beaver	Lemming
Species	Castor canadensis	Lemmus
Habitat	Aquatic environments	Tundra and grasslands
Diet	Herbivorous	Herbivorous
Size	Large, up to 70 lbs	Small, up to 4.5 oz
Behavior	Builds dams and lodges	Migratory in large groups

Physical Characteristics

Beavers and lemmings are both small mammals, but they have distinct physical characteristics. Beavers are known for their large, flat tails that they use for swimming and building dams. They also have webbed feet that help them navigate through water. In contrast, lemmings are much smaller in size and have round bodies with short legs. They do not have the same adaptations for aquatic life as beavers do.

Habitat

Beavers and lemmings have different habitat preferences. Beavers are primarily found near bodies of water such as rivers, streams, and ponds. They build elaborate dams and lodges to create their own aquatic habitats. Lemmings, on the other hand, are typically found in tundra and grassland regions. They burrow underground to create their homes and are well-adapted to cold climates.

Diet

When it comes to diet, beavers and lemmings have different preferences. Beavers are herbivores and primarily feed on tree bark, leaves, and aquatic plants. They are known for their ability to fell trees and build dams using their sharp incisors. Lemmings, on the other hand, are omnivores and will eat a variety of foods including grasses, seeds, insects, and small mammals. They are opportunistic feeders and will consume whatever is available in their environment.

Behavior

Beavers and lemmings exhibit different behaviors in their respective habitats. Beavers are known for their engineering skills and ability to modify their environment. They build dams to create ponds and lodges for shelter. Beavers are also social animals that live in family groups. Lemmings, on the other hand, are solitary creatures that are known for their periodic population explosions. They are also known for their migratory behavior, where they will travel long distances in search of food and suitable habitat.

Reproduction

Reproduction in beavers and lemmings also differs. Beavers typically mate for life and have a monogamous breeding system. They give birth to 1-6 kits in a litter, which are cared for by both parents. Lemmings, on the other hand, have a more promiscuous breeding system and do not form long-term pair bonds. They have larger litters of 5-10 pups, which are raised by the female alone.

Adaptations

Both beavers and lemmings have unique adaptations that help them survive in their respective environments. Beavers have specialized teeth that continue to grow throughout their lives, allowing them to constantly gnaw on wood. They also have a transparent third eyelid that acts as a protective shield while swimming underwater. Lemmings, on the other hand, have thick fur coats that provide insulation in cold climates. They also have short tails and ears to minimize heat loss.

Interactions with Humans

Beavers and lemmings have different interactions with humans. Beavers are often seen as pests by humans due to their habit of damming rivers and flooding agricultural land. However, they are also valued for their role in creating wetland habitats and improving water quality. Lemmings, on the other hand, have little direct interaction with humans. They are not considered pests and are not typically targeted for hunting or trapping.