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The Arctic ground squirrel hibernates over winter from early August to late April in adult females and from late September to early April for adult males, [15] at which time it can reduce its body temperatures from 37 °C (99 °F) to as little as −3 °C (27 °F). [16]
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Hibernating Arctic ground squirrels may exhibit abdominal temperatures as low as −2.9 °C (26.8 °F), maintaining sub-zero abdominal temperatures for more than three weeks at a time, although the temperatures at the head and neck remain at 0 °C (32 °F) or above.
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 ...
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 ...
The body mass ranges from 1.9 to 8 kg (4.2–17.6 lb), with the animals being significantly lighter in the spring (just after hibernation) than in the autumn (just before hibernation). [ 6 ] [ 7 ] The alpine marmot is sometimes considered the heaviest squirrel species, although some other marmot species have a similar weight range, making it ...
The Columbian ground squirrel is one of the largest members of the genus, the largest being the Arctic ground squirrel. [2] They have a relatively sturdy, robust build. They measure 325–410 mm (12.8–16.1 in) in length overall, with a tail measuring 80–116 mm (3.1–4.6