Tree squirrels, like this eastern gray squirrel, are seen in many parks, backyards, and forests throughout the world.
Squirrels are familiar to almost everyone. More than 200 squirrel
species live all over the world, with the notable exception of
Australia.
The tiniest squirrel is the aptly named African pygmy
squirrel—only five inches (thirteen centimeters) long from nose to tail.
Others reach sizes shocking to those who are only familiar with common
tree squirrels. The Indian giant squirrel is three feet (almost a meter)
long.
Like other rodents, squirrels have four front teeth that
never stop growing so they don't wear down from the constant gnawing.
Tree squirrels are the types most commonly recognized, often seen
gracefully scampering and leaping from branch to branch. Other species
are ground squirrels that live in burrow or tunnel systems, where some
hibernate during the winter season.
