Sciuridae
Red-tailed Squirrel
Sciurus granatensis Humboldt, 1811
Sciurus granatensis, the red-tailed squirrel, is a tree squirrel native from southern Central America to northern South America.
Guayaquil Squirrel
Sciurus stramineus Eydoux & Souleyet, 1841
Sciurus stramineus, the Guayaquil squirrel, is a variable-colored tree squirrel native to western South America, with no recognized subspecies.
Andean Squirrel
Sciurus pucheranii (Fitzinger, 1867)
Sciurus pucheranii, the Andean squirrel, is a small tree squirrel found in Colombian Andean cloud and montane rain forests.
Bolivian Squirrel
Sciurus ignitus (Gray, 1867)
Sciurus ignitus, the Bolivian squirrel, is a moderately sized tree squirrel distributed along the eastern Andes from Peru to northern Argentina.
Southern Amazon Red Squirrel
Sciurus spadiceus Olfers, 1818
Sciurus spadiceus (southern Amazon red squirrel) is a large South American squirrel with three recognized subspecies.
Eastern Gray Squirrel
Sciurus carolinensis Gmelin, 1788
Sciurus carolinensis, the eastern gray squirrel, is a widespread tree squirrel native to eastern North America with introduced invasive populations elsewhere.
Deppe's Squirrel
Sciurus deppei Peters, 1863
Deppe's squirrel (Sciurus deppei) is a small Mesoamerican squirrel with stable populations and flexible habitat needs.
Yucatán Squirrel
Sciurus yucatanensis J.A.Allen, 1877
Sciurus yucatanensis, the Yucatan squirrel, is a larger squirrel with distinct fur and skull characteristics detailed here.
Variegated Squirrel
Sciurus variegatoides Ogilby, 1839
Sciurus variegatoides, the variegated squirrel, is a medium-sized diurnal tree squirrel native to Central America.
Red-bellied Squirrel
Sciurus aureogaster F.Cuvier, 1829
Sciurus aureogaster, the Mexican gray squirrel, is native to Mexico and southern Guatemala, introduced as invasive to Florida.
Collie's Squirrel
Sciurus colliaei Richardson, 1839
Collie's squirrel is a medium-sized gray squirrel native to western coastal Mexico that lives in dense tropical and subtropical vegetation.
Japanese Squirrel
Sciurus lis Temminck, 1844
Sciurus lis, the Japanese squirrel, is a Japan-endemic tree squirrel facing population decline from human forest fragmentation.
Eurasian Red Squirrel
Sciurus vulgaris Linnaeus, 1758
Sciurus vulgaris, the red squirrel, is a tree-dwelling squirrel found across Eurasia with characteristic ear tufts.
Caucasian Squirrel
Sciurus anomalus Gmelin, 1778
Caucasian squirrel (Sciurus anomalus) is a small native south-west Asian tree squirrel with three recognized subspecies.
Peters's Squirrel
Sciurus oculatus Peters, 1863
Peters's squirrel (Sciurus oculatus) is a large endemic Mexican arboreal squirrel living in high elevation forests.
Allen's Squirrel
Sciurus alleni Nelson, 1898
Allen's squirrel (Sciurus alleni) is an endemic tree squirrel of northern Mexico with no recognized subspecies.
Arizona Gray Squirrel
Sciurus arizonensis Coues, 1867
Sciurus arizonensis, the Arizona gray squirrel, is a North American sciurid rodent facing local population declines from habitat loss and competition.
Eastern Fox Squirrel
Sciurus niger Linnaeus, 1758
Sciurus niger (fox squirrel) is a large North American tree squirrel with specific habitat, behavior, and reproduction patterns.
Mexican Fox Squirrel
Sciurus nayaritensis J.A.Allen, 1890
The Mexican fox squirrel is a tree squirrel found in parts of Mexico and southeastern Arizona, US, rated Least Concern on the IUCN Red List.
Guianan Squirrel
Sciurus aestuans Linnaeus, 1766
Sciurus aestuans, the Brazilian/Guianan squirrel, is a dark brown South American tree squirrel endemic to the region.
Abert's Squirrel
Sciurus aberti Woodhouse, 1853
Sciurus aberti (Abert's squirrel) is a diurnal pine-associated squirrel species native to western North America with distinctive long ear tufts.
Western Gray Squirrel
Sciurus griseus Ord, 1818
Sciurus griseus, the western gray squirrel, is the largest native tree squirrel of the Pacific Northwest, currently threatened in parts of its range.
Central American Dwarf Squirrel
Microsciurus alfari (J.A.Allen, 1895)
Microsciurus alfari, or Central American dwarf squirrel, is a Central and South American rainforest-dwelling squirrel species.
Western Dwarf Squirrel
Microsciurus mimulus (Thomas, 1898)
Microsciurus mimulus, the western dwarf squirrel, is a small tree squirrel found in Colombia, Ecuador, and Panama.
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