Chipmunks are small, striped rodents of Sciuridae, the squirrel family; specifically, they are ground squirrels (Marmotini). Chipmunks are found in North America, with the exception of the Siberian chipmunk which is found primarily in Asia.
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.
Marmots are large ground squirrels in the genus Marmota, with 15 species living in Asia, Europe, and North America. These herbivores are active during the summer, when they can often be found in groups, but are not seen during the winter, when they hibernate underground. They are the heaviest members of the squirrel family.
The California ground squirrel, also known as the Beechey ground squirrel, is a common and easily observed ground squirrel of the western United States and the Baja California Peninsula; it is common in Oregon and California and its range has relatively recently extended into Washington and northwestern Nevada. Formerly placed in Spermophilus, as Spermophilus beecheyi, it was reclassified in Otospermophilus in 2009, as it became clear that Spermophilus as previously defined was not a natural (monophyletic) group. A full species account was published for this species in 2016.
Ground squirrels are rodents of the squirrel family (Sciuridae) that generally live on the ground or in burrows, rather than in trees like the tree squirrels. The term is most often used for the medium-sized ground squirrels, as the larger ones are more commonly known as marmots or prairie dogs, while the smaller and less bushy-tailed ground squirrels tend to be known as chipmunks.
Spermophilus is a genus of ground squirrels in the squirrel family. As traditionally defined the genus was very species-rich, ranging through Europe, Asia and North America, but this arrangement was found to be paraphyletic to the certainly distinct prairie dogs, marmots, and antelope squirrels. As a consequence, all the former Spermophilus species of North America have been moved to other genera, leaving the European and Asian species as true Spermophilus.
Asiatic striped squirrels are a genus (Tamiops) of squirrels (Sciuridae) in the subfamily Callosciurinae. They are small striped arboreal squirrels from Asia. Their head to body length measured from 10 to 13 cm. They often are confused with other squirrels. In contrast to these other squirrels, they have smaller rounded ears with white-tipped hairs. A black longitudinal stripe is present in the middle of the back, which is parallel on both sides with two pairs of pale longitudinal stripes. These pale stripes are separated by dark brownish stripes. In some countries, they are kept as pets.
Red-cheeked squirrels are species of squirrels in the genus Dremomys in the subfamily Callosciurinae. The six species which are all found only in Asia are listed as "Least Concern" by the IUCN.
Hylopetes is a genus of flying squirrels. There are about 10 species.
The African bush squirrels are a genus of squirrels, Paraxerus, in the subfamily Xerinae. They are only found in Africa. The 11 species in this genus are:
The black-capped marmot is a species of rodent in the family Sciuridae. It is endemic to the Russian Far East, but its range is discontinuous and divided into three main parts, each with its own subspecies. The black-capped marmot lives in arctic tundra and alpine habitats from near sea-level to an altitude of 2,000 m (6,600 ft). Depending on exact subpopulation, they hibernate for 6–8 months each year, which is long for a marmot.
The Menzbier's marmot is a species of rodent in the family Sciuridae from Central Asia. Its name commemorates Russian zoologist Mikhail Aleksandrovich Menzbier.
The Père David's rock squirrel, also known as the Chinese rock squirrel, is a species of rodent in the family Sciuridae. It is endemic to China, where it is found widely in rocky habitats in the eastern and central parts of the country. This largely terrestrial squirrel is overall dull olive-grey with paler underparts, a distinct pale eye-ring and a dark patch on the cheeks. It has sometimes been confused with the rather different –but in colour very variable– Pallas's squirrel; an introduced population in Belgium was first mistakenly identified as Père David's rock squirrel.
Forrest's rock squirrel is a species of rodent in the family Sciuridae. It is endemic to Sichuan and Yunnan in China, where it inhabits cliffs covered in shrubby vegetation at an altitude around 3,000 m (9,800 ft). Relatively little is known about Forrest's rock squirrel, but its behavior is assumed to resemble that of its more widespread relative, Père David's rock squirrel. In appearance, it largely resembles Père David's rock squirrel, but Forrest's rock squirrel is more ochraceous in colour and has a faint whitish line on the side.
The Xerinae comprise a subfamily of squirrels, many of which are highly terrestrial. It includes the tribes Marmotini, Xerini, and Protoxerini.
Otospermophilus is a genus of ground squirrels in the family Sciuridae, containing three species from Mexico and the United States. Otospermophilus was formerly placed in the large ground squirrel genus Spermophilus, as a subgenus or species group. Since DNA sequencing of the cytochrome b gene has shown Spermophilus to be paraphyletic to the prairie dogs and marmots, it is now separated, along with six other genera.
Pygmy ground squirrels are small ground squirrels in the genus Xerospermophilus, family Sciuridae, containing four species from Mexico and the United States. The members of this genus were formerly placed in the large ground squirrel genus Spermophilus. Since DNA sequencing of the cytochrome b gene showed that Spermophilus was paraphyletic to the prairie dogs and marmots, this group is now separated, along with six other genera. Within the genus, the Mohave ground squirrel and the round-tailed ground squirrel were thought to be close relatives, sometimes a subgenus Xerospermophilus, while the spotted ground squirrel and the Perote ground squirrel were formerly placed in the subgenus Ictidomys.
The Rio Grande ground squirrel is a species of squirrel in the family Sciuridae. It is found in the south-western United States and in north-eastern Mexico.
