Beaver
All About Rodents
Small animals, strong teeth! Discover why the incisors of rodents are so unique!
What Are Rodents?
Rodents are small creatures that excel at gnawing. They possess two large teeth at the front of their mouths that continuously grow, which is why they need to be used frequently. Examples of rodents include mice, hamsters, squirrels, and guinea pigs. Many of them feed on plants, seeds, or nuts and reside in burrows, nests, or trees. Rodents can be found almost everywhere in the world, and they are often quick and curious.
Main Characteristics of Rodents
- There are about 2,500-2,600 species of rodents. They make up almost half of all mammal species.
- Rodents include beavers, rats, mice, squirrels, dormice, hamsters, chinchillas and guinea pigs.
- Most rodents are herbivores, some are omnivores.
- The capybara is the largest rodent. It has a body length of 3.6-4.2 feet (100-130 cm) and weighs 110-132 pounds (50-60 kg).
- The smallest rodents include the African pygmy mouse and the Eurasian harvest mice. They weigh less than 0.17 ounces (5 grams).
Rodent Family Tree
Top 3 Features of Rodents
1. Incisors That Keep Growing
Rodents have two large incisors in both their upper and lower jaws. These teeth never stop growing. Therefore, rodents must gnaw constantly to wear them down; otherwise, the teeth will become too long.
2. No Canine or Fang Teeth
Unlike carnivores, rodents lack canine or fang teeth. After all, they don’t need to hold onto prey. Instead of canines, there is a significant gap that helps them break down plants and other tough foods.
3. Small Body, Short Legs
Most rodents have a small, lightweight body and short legs. This allows them to move very quickly and climb exceptionally well. Some can also swim quite effectively.
The Most Diverse Order of Mammals
There are about 6,600 species of mammals. The majority of these are rodents: around 2,500-2,600 species. This accounts for approximately 40% of all mammal species.
