16. Colorado Tree Squirrels Colorado is home to three kinds of tree squirrels. The rusty red fox squirrel: the Abert’s squirrel which has a striking black or salt-and-pepper gray coat and magnificent ear-tufts: and the smaller but noisier pine squirrel, or chickaree. Abert’s and fox squirrels are about the same size (up to 20 inches long and two pounds in weight), although Abert’s has longer fur and therefore looks larger. The pine squirrel is much smaller – up to 14 inches long and weighing only about nine ounces. http://wildlife.state.co.us/WildlifeSpecies/Profiles/Mammals/TreeSquirrel.htm