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Richardson's ground squirrel (Urocitellus richardsonii), also known as the dakrat or flickertail, is a North American ground squirrel in the genus Urocitellus.Like a number of other ground squirrels, they are sometimes called prairie dogs or gophers, though the latter name belongs more strictly to the pocket gophers of family Geomyidae, and the former to members of the genus Cynomys.
Urocitellus is a genus of ground squirrels.They were previously believed to belong to the much larger genus Spermophilus, but DNA sequencing of the cytochrome b gene showed that this group was paraphyletic to the prairie dogs and marmots, [2] [3] and could therefore no longer be retained as a single genus.
Ground squirrels are rodents of the squirrel family 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 (genus Marmota) or prairie dogs, while the smaller and less bushy-tailed ground squirrels tend to be known as chipmunks (genus ...
Thirteen-lined ground squirrels can survive in hibernation for over six months without food or water and special physiological adaptations allow them to do so. [6] They alternate between torpor bouts of 7 to 10 days when their body temperatures drops to 5-7°C, and interbout arousals of less than 24 hours with their body temperature back to 37 ...
The latest common ancestor of Douglas ground squirrel and the California ground squirrel has been estimated to have lived approximately 0.725 million years ago, coinciding with the moment when the San Joaquin and Sacramento River started flowing, creating a barrier for gene flow between the populations that would give rise to these two species ...
Paenemarmota is the largest known ground squirrel and is nearly twice as large as the largest living marmots.Weight estimates for P. barbouri are around 9.5 kg (21 lb) on the basis of femur dimensions, or up to 16 kg (35 lb) on the basis of lengths of premolars.
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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 , [ 2 ] it is now separated, along with six other genera.