Tree Squirrels
Order: Rodentia
Suborder: Sciurognathi
Family: Sciuridae
Tribe: Sciurini
Subtribe: Sciurina
Genus: Sciurus
Subgenus: Sciurus
Number of known species of Sciurus: 28
(Hoffman, et al; 1993)
Number of recognized subspecies of Sciurus Niger: 10
(Hall, 1981)
Links to specific species:
Fox Squirrel (Sciurus niger)
Grey Squirrel (Sciurus carolinensis)
Pine Squirrel (Tamiasciurus hudsonicus)