Tree squirrel Tree squirrel Tree squirrels are the members of the squirrel family (Sciuridae) commonly just referred to as "squirrels". They include over a hundred arboreal species native to all continents except Antarctica and Oceania. They do not form a single natural, or monophyletic group; they are related to others in the squirrel family, including ground squirrels, flying squirrels, marmots, and chipmunks. The defining characteristic used to determine which species of Sciuridae are tree squirrels is dependent on their habitat rather than their physiology. Tree squirrels live mostly among trees, as opposed to those that live in burrows in the ground or
Monte Cristo arboreal alligator lizard disappearing. Some scientists estimate that the cloud forests will disappear in the near future. These cloud forests are a major place of biodiversity. "A. montecristoi" is just one of a vast number of species that call these forests home. Conservation efforts are currently being made by the Tropical Montane Cloud Forest Initiative which is made up of three conservations program consisting of the United Nations Environment Program, the World Conservation Union, and the World Wide Fund for Nature. Monte Cristo arboreal alligator lizard The Monte Cristo arboreal alligator lizard ("Abronia montecristoi" ) is an endangered species of lizard. This species