Franklin's ground squirrel | |
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In Alberta, Canada | |
Scientific classification | |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Rodentia |
Family: | Sciuridae |
Subfamily: | Xerinae |
Tribe: | Marmotini |
Genus: |
Poliocitellus Howell, 1938 |
Species: | P. franklinii |
Binomial name | |
Poliocitellus franklinii (Sabine, 1822) |
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Synonyms | |
Spermophilus franklinii |
Spermophilus franklinii
Citellus franklinii
Franklin's ground squirrel (Poliocitellus franklinii) is a species of squirrel native to North America, and the only member of the genus Poliocitellus. Due to the destruction of prairie, the populations of Franklin's ground squirrel have dwindled, approaching levels of concern. However, the species is prolific and locally abundant.
Franklin's ground squirrel was first described by Joseph Sabine in 1822, who named it in honor of the British Arctic explorer Sir John Franklin. It was formerly placed in the large ground squirrel genus Spermophilus, in its own subgenus, Poliocitellus, but since DNA sequencing of the gene has shown Spermophilus to be paraphyletic it is now placed in its own genus. Franklin's ground squirrel is suggested to be sister to a clade containing not only the Mohave, round-tailed, spotted, and Perote ground squirrels (genus Xerospermophilus), but the prairie dogs as well. There are no commonly recognized subspecies.
Franklin's ground squirrel is a typically sized squirrel, with adults measuring from 36 to 41 cm (14 to 16 in) in total length, including the 11 to 15 cm (4.3 to 5.9 in) tail. Males weigh about 370 g (13 oz) in the spring, and up to 950 g (34 oz) in the fall. In comparison, females are significantly lighter, and put on proportionally less weight through the year, being about 320 g (11 oz) in the spring, and up to 760 g (27 oz) in the fall. The fur is brownish grey marked with both light and dark speckles, and fades to yellowish white on the animal's underside. The tail is darker, almost blackish in color, while the head is a relatively solid grey.