Defying Gravity

My friend the squirrel, in a very playful mode, is showing off that he (or she? Who knows?) has no concern for gravity. These fellows move around so fast in the trees it's hard to follow them by eye. A squirrel is one of the many small or medium-sized rodents in the family Sciuridae, referring to the family's genera Sciurus and Tamiasciurus, which are tree squirrels with large bushy tails, indigenous to Asia, the Americas and Europe. These live in the trees in my yard. Similar genera are found in Africa. The Sciuridae family also include flying squirrels, as well as ground squirrels such as the chipmunks, prairie dogs, and woodchucks.