Arctic Ground Squirrels
(Urocitellus parryii), North American Red Squirrels (Tamiasciurus hudsonicus), Spruce Grouse (Falcipennis canadensis), voles (Microtus spp.
Being high is better: Effects of elevation and habitat on Arctic ground squirrel
The Arctic ground squirrel
is the only known mammal capable of lowering its body temperature to below freezing during hibernation.
A shadow would send them tumbling back into the den, which I suspected was once the labyrinth of some arctic ground squirrels
One study reported that Arctic ground squirrels
moved 19 tons of soil/acre/yr at one study site (Price, 1971).
Schmidt's (1963) analysis of fecal pellets from 15 Arctic ground squirrels
(Spermophilus parryii) documented a 1000 fold increase in psychrophilic bacteria (microbes exhibiting an optimum temperature of 15[degrees]C and an inability to grow above 20[degrees]C) and a 1000 fold reduction in coliform bacteria, while numbers of enterococci remained rather constant.
Predator species 1990 1991 1992 Red fox 21 (7:14) 4 (2:2) 0 Suspected fox 5 4 0 Arctic ground squirrel
0 2 0 Grizzly bear 0 2 0 Ermine 0 0 0 Rough-legged Hawk 7 (4:3) 17 (4:3) 0 Peregrine Falcon 0 1 1 Unknown raptor 6 7 0 Total 39 37 1
On 24 May 2014, I observed a Bald Eagle in adult plumage killing and eating an Arctic Ground Squirrel
at the Yukon Wildlife Preserve (60.
Number of Species specimens Order Rodentia (32%) Red squirrel (Tamiasciurus hudsonicus) 1 Arctic ground squirrel
(Spermophilus parryii) * 51 Northern collared lemming (Dicrostonyx groenlantdicus) * 71 Nearctic brown lemming (Lemmus trimucronatus) * 16 Tundra vole (Microtus oeconomus) * 24 Northern red-backed vole (Myodes rutilus) 4 Muskrat (Ondatra zibethicus) 2 Deer mouse (Peromyscus maniculatus) 1 Order Lagomorpha (5.
Ongoing paleontological work on fossil arctic ground squirrel
nests and caches in central Yukon, however, reveals that a much wider variety of species was cached in the past.
Take the extraordinary case of a hibernating arctic ground squirrel
The hibernating arctic ground squirrel
, Spermophilus parryii, can drop as low as -2.
Among small herbivores with relatively confined home ranges, the arctic ground squirrel
(Spermophilus parryi) was selected as a target species because of its ubiquitous distribution, reliance on fat reserves during hibernation, importance as a prey species (Carl, 1971: Jones and Theberge, 1983; Poole and Boag, 1988) and well-studied physiology and life history (e.
Annual cycle of body composition and hibernation in free-living arctic ground squirrels
There are Arctic ground squirrels
who manage to hibernate for eight months of the year, herds of caribou in their millions and rivers that run unseen underneath glaciers.