Physical Traits:
* Two large, continuously growing incisors: These are the most defining feature of rodents. These front teeth are designed for gnawing and never stop growing, requiring the rodent to constantly wear them down by chewing.
* Single pair of lower incisors: They have a single pair of lower incisors that match the upper incisors in size and shape.
* Gap between incisors and molars: There's a gap, called a diastema, between the incisors and molars. This gap allows for proper chewing and prevents the incisors from being worn down by the molars.
* Four-chambered heart: Like most mammals, rodents have a four-chambered heart for efficient circulation.
* Small size: While there are exceptions, most rodents are relatively small.
* Long tail: While some rodents have shorter tails, many have long, often prehensile tails (capable of grasping).
Behavioral Traits:
* Herbivorous or omnivorous: Most rodents primarily feed on plants, but some are omnivorous, consuming both plant and animal matter.
* High reproductive rate: Rodents have a high reproductive rate, often producing large litters of offspring.
* Nocturnal or crepuscular: Many rodents are nocturnal or crepuscular (active at dawn and dusk), adapting to avoid predators.
* Burrowing or tree-dwelling: Rodents often live in burrows underground or in trees, depending on their species.
Important Note: While these characteristics are common, there is a huge diversity among rodents. Some species, like the capybara (the largest rodent), have unique adaptations and variations in their physical and behavioral traits.