The 21 Basic Mammal Groups
Rodents (Order Rodentia)
The most diverse mammal group, consisting of over 2000 species, order Rodentia includes squirrels, dormice, mice, rats, gerbils, beavers, gophers, kangaroo rats, porcupines, pocket mice, springhares, and many others. What all of these tiny, furry critters have in common are their teeth: one pair of incisors in the upper and lower jaw and a large gap (called a diastema) located between the incisors and the molars. The "buck-toothed" incisors of rodents grow continuously and are maintained by constant use. The grinding and gnawing of rodents ensure that their incisors always remain sharp and stay at the correct length.
The 21 Basic Mammal Group caches were placed for HNY21.