Sciurinae Tribe Sciurini – tree squirrels (5 genera, about 38 species) Tribe Pteromyini – true flying squirrels (15 genera, about 45 species) Subfamily Callosciurinae – Asian ornate squirrels Tribe Callosciurini (13 genera, nearly 60 species) Tribe Funambulini palm squirrels (1 genus, 5 species) Subfamily Xerinae – terrestrial squirrels Tribe Xerini – spiny squirrels (3 genera, 6 species) Tribe Protoxerini (6 genera, about 50 species) Tribe Marmotini – ground squirrels, marmots, chipmunks, prairie dogs, etc. (6 genera, about 90 species) Society Squirrels are a cause for concern because they often cause electrical disruptions. It has been hypothesized that the threat to the internet, infrastructure and services posed by squirrels may exceed that posed by cyber-attacks. See also American red squirrel Animal track Black squirrel Eastern gray squirrel Fox squirrel List of animal names#squirrel Red squirrel Squirrel relationship with humans Variant Creutzfeldt–Jakob disease (Kuru) from eating squirrel brains. Western gray squirrel References Further reading Milton, Katherine (1984): "Family Sciuridae". In: Macdonald, D. (ed.): The Encyclopedia of Mammals: 612–623. Facts on File, New York. . Steppan, Scott J. and Hamm, Shawn M. (2006): Tree of Life Web Project – "Sciuridae (Squirrels)". Version of 13 May 2006. Retrieved 10 December 2007. Thorington, R.W. and Hoffmann, R.S. (2005): "Family Sciuridae". In: Mammal Species of the World: A Taxonomic and Geographic Reference: 754–818. Johns Hopkins University Press, Baltimore. Whitaker, John O. Jr. and Elman, Robert (1980): The Audubon Society Field Guide to North American Mammals (2nd ed.). Alfred Knopf, New York. External links Tree of Life: Sciuridae Squirrel Tracks: How to identify squirrel tracks in the wild National Geographic link on Squirrels List of names of squirrel taxa Articles containing video clips Extant Eocene first appearances Rodents by common name Taxa named by Gotthelf Fischer von Waldheim