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The Arizona gray squirrel (Sciurus arizonensis) is a tree squirrel, in the genus Sciurus, endemic to the canyons and valleys surrounded by deciduous and mixed forests in eastern Arizona and northern Mexico. It is threatened by habitat loss.
The number of species in the genus is subject to change. In 2005, Thorington & Hoffman- whose taxonomic interpretation is followed by the IUCN website- accepted 28 species in the genus: [a] Genus Sciurus. Sciurus granatensis. Subgenus Sciurus. Allen's squirrel, Sciurus alleni; Arizona gray squirrel, Sciurus arizonensis
Kaibab squirrel at Grand Canyon National Park North Rim. Kaibab squirrels usually have a black belly (which is sometimes gray), white tail, tufted ears and chestnut brown back. [3] The tufts on the ears grow longer with age and may extend 1 to 2 inches (2.5 to 5.1 cm) above the ears in the winter, and may not be visible in the summer.
The currently accepted scientific name for Abert's squirrel is Sciurus aberti Woodhouse, 1853. [4] Woodhouse had initially described the species as Sciurus dorsalis in 1852, but this name turned out to be preoccupied by Sciurus dorsalis Gray, 1849 (now a subspecies of variegated squirrel S. variegatoides), and thus the present species was renamed.
Gray squirrel or grey squirrel may refer to several species of squirrel indigenous to North America: The eastern gray squirrel ( Sciurus carolinensis ), from the eastern United States and southeastern Canada; introduced into the United Kingdom, Ireland, western North America, Italy, and South Africa
The southern fox squirrel (Sciurus niger niger) is a close relative of the gray squirrel, which is one of the most common squirrel species in the country, and is considered to be the most variably ...
The species is the largest tree squirrel in the state. It’s being threatened by climate change, habitat loss and frequent disease outbreaks. Gray squirrel may become endangered species in WA.
Eastern gray squirrels are crepuscular, [24] or more active during the early and late hours of the day, and tend to avoid the heat in the middle of a summer day. [40] They do not hibernate. [41] Eastern gray squirrels can breed twice a year, but younger and less experienced mothers normally have a single litter per year in the spring.