Squirrels are members of the family Sciuridae, a family that includes small or medium-size rodents. The squirrel family includes tree squirrels, ground squirrels, and flying squirrels. Squirrels are indigenous to the Americas, Eurasia, and Africa, and were introduced by humans to Australia. The earliest known fossilized squirrels date from the Eocene epoch, and among other living rodent families, the squirrels are most closely related to the mountain beaver and to the dormice.
The genus Sciurus contains most of the common, bushy-tailed squirrels in North America, Europe, temperate Asia, Central America and South America.
The Bolivian squirrel is a tree squirrel that is endemic to South America. Little is known of the species, which may represent a species complex.
The northern Amazon red squirrel is a squirrel species from South America. It occurs in Brazil, Colombia, Ecuador, Peru and Venezuela.
The yellow-throated squirrel is a tree squirrel in the genus Sciurus endemic to South America. It is found in Brazil, Guyana and Venezuela.
Microsciurus or dwarf squirrels is a genus of squirrels from the tropical regions of Central and South America.
The Mexican gray squirrel is a tree squirrel in the genus Sciurus native to Guatemala and eastern and southern Mexico. It has been introduced to the Florida Keys.
The orange-bellied Himalayan squirrel is a species of rodent in the family Sciuridae. It is found in Bangladesh, China, India, Myanmar, Nepal and Bhutan.
The Santander dwarf squirrel is a small tree squirrel endemic to Colombia.
Hagen's flying squirrel is a species of rodent in the family Sciuridae. It is endemic to Indonesia.
The slender-tailed squirrel is a species of rodent in the family Sciuridae found in Ivory Coast, Ghana, Liberia, and Sierra Leone. Its natural habitat is subtropical or tropical moist lowland forests.
Deppe's squirrel is a species of tree squirrel in the genus Sciurus native to Belize, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, and Nicaragua.
The fiery squirrel is a rodent in the family Sciuridae. The taxon is endemic to the area south of the Orinoco River in the state of Bolívar, Venezuela.
The red-tailed squirrel is a species of tree squirrel distributed from southern Central America to northern South America.
The Mexican fox squirrel is a species of tree squirrel found throughout the Sierra Madre Occidental of Mexico as far south as Jalisco — and northward into the Chiricahua Mountains of southeastern Arizona, U.S.
The Andean squirrel is a tree squirrel endemic to Colombia where it inhabits montane rain forest and cloud forests of the Cordillera Occidental and Cordillera Central ranges of the Colombian Andes, at elevations between 2,000 and 3,300 metres. It is a small species with a body length of about 14 cm (6 in) and a similar length tail. It has soft, silky, reddish-brown fur, a darker tail and yellowish-grey underparts. It is thought to be diurnal but has been little studied, and the International Union for Conservation of Nature has rated its conservation status as being data deficient.
The Junín red squirrel is a species of squirrel from Peru and Ecuador.
Richmond's squirrel is a poorly known tree squirrel in the genus Sciurus endemic to Nicaragua, which is likely a synonym of the red-tailed squirrel. It is locally known as the ardilla del rama.
The Yucatan squirrel, originally named the Yucatan gray squirrel, also once named the Campeche squirrel, is a tree squirrel in the genus Sciurus found in the Yucatán Peninsula and adjacent areas. It is native to northern Belize, northeastern Guatemala, and southeast Mexico.
The maritime striped squirrel or eastern striped squirrel is a species of rodent in the family Sciuridae. It is found in southern and eastern China, Taiwan, and Laos and Vietnam east of Mekong. It is diurnal, highly arboreal and feeds on fruits, seeds, insects; in addition its diet includes nectar of ginger.
