The majority of ground and tree squirrels are diurnal, meaning they are active during the day and sleep at night. Flying squirrels, however, tend to be nocturnal and are active at night. More »

There are many different kinds of squirrels, but most squirrels, such as the gray squirrel, red squirrel and fox squirrel, build their dens in the sides of trees while ground squirrels typically dig dens underground. A c... More »

At night, squirrels conclude their activities by retreating to nests, which are primarily built in trees. Like birds, most squirrels build nests to serve as homes, which they use for raising young and resting. Many const... More »

According to the West Virginia Wildlife Magazine, squirrels make tree cavity dens and leaf nests which are built inside trees or up on branches located very high off the ground. Tree dens offer greater protection from th... More »

Most tree-dwelling squirrels, such as red and gray squirrels, do not hibernate during winter and stay active throughout the day as long as the temperature does not fall below 30 degrees Fahrenheit. Ground squirrels, espe... More »

The vast majority of squirrels are dark brown, which makes white squirrels rare. However, in certain parts of the United States and other countries, white squirrels are common. More »

Arctic ground squirrels mostly eat vegetation, but they're opportunistic feeders that will eat everything from bird eggs and hatchlings to invertebrates like insects, spiders or small reptiles. They've also been known to... More » Pets & Animals Mammals Rodents