Marmota
caligata
(Hoary Marmot)
Description:
The hoary marmot is quite large,
with a silver-gray color above, a brownish
rump and it is white underneath. It has black and white markings on its head
and shoulders. Its tail is conspicuous, reddish-brown and quite bushy. Total
length is nearly 18 to 32 ¼ inches (450-820 mm), its tail is 6 ¾ to 9 ¾ inches
(170-250 mm), and its weights 8 to 20 pounds (3.6-9 kg).
Range:
From
Alaska to Yukon, and south to Washington, northern Idaho, and western Montana.
Idaho distribution is not well known, particularly along southern end of range.
Habitat:
Found on talus slopes and alpine meadows,
often high in mountains near timberline. In Idaho, prefers rocky granitic habitats
in subalpine and higher elevations.
Diet:
Diet consists almost entirely of grasses
and other herbaceous plants.
Ecology:
Its silvery appearance provides good camouflage in its rocky habitat. Its
burrows are large, 9 to 15 inches in diameter, and of course, it often burrows
under rocks. Like most “ground inhabiting squirrels” it rapidly gains weight
prior to hibernation. They hibernate
from October through February
in its southern range, from September to April in British Columbia. It gives
off a loud, shrill whistle when disturbed that is louder than other marmots.
They are preyed on by eagles and other carnivores that inhabit their range,
plus they are occasionally dug up from their hibernation burrows by grizzly
bears who emerge from hibernation earlier than the hoary marmots. In the northern
part of their range (Canada and Alaska), their fur is used for parkas, and they
are also consumed by humans for food.
Reproduction:
Mating occurs shortly after emerging from hibernation. A female gives birth
to 4 to 5 young about a month after breeding.
Conservation:
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Global Rank: |
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State Rank: |
S4 |