Mammals that are in the Rodentia order comprise the rodents that we know today. Vast numbers of rodent species can be found worldwide, with the exception of Antarctica. Over 40 percent of all mammal species are rodents.
There are a large number of families that belong to Rodentia. Within the superfamily Muroidea, the most recognizable rodent species can be found. The true rats and mice, new world rats and mice, as well as voles and gerbils represent the families Cricetidae and Muridae. This is the largest group of species in the rodent family. Mice and rats are the best-known rodent pests. Species like the Norway rat, the house mouse and the roof rat are all within these families.
Another well-known family of rodents is the Sciuridae family. Members of this family include squirrels, chipmunks and marmots. Although not as problematic as rats or mice, these rodents can be pests in their own right, destroying gardens and lawns with burrows and tunnels. Squirrels can also cause much damage to structures
There are over 2,000 species of rodents and what define them are their characteristic teeth, which never quit growing and must constantly be sharpened. Rodents will gnaw on almost any hard surface to keep their teeth shaped.
Most rodents are plant or seedeaters , but they are capable of eating a variety of different foods and will scavenge to find food from a number of different sources.This does not make sence to me. Their survival has been based on the fact that the majorities of rodents are very small, have such varied diets, and are prolific breeders.
Rodents have been around for over 65 million years. Fossil evidence suggests a great number of much larger rodents, some weighing upwards of a ton, once lived on earth. The evolution of rodents has made them smaller and easily adaptable, allowing them to thrive around the world. Who are they. . This paragraph seems disjointed