Ungava Collared Lemming
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| Ungava Collared Lemming | ||||||||||||||
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| Dicrostonyx hudsonius (Pallas, 1778) |
The Ungava Collared Lemming or Labrador Collared Lemming, Dicrostonyx hudsonius is a small North American lemming.
They have short chunky bodies covered with brownish-grey fur with a thin dark stripe along their back and a yellow line along their sides. They have small ears, short legs and a very short tail. They have a reddish collar across their chest and a reddish patch behind their ears. In winter, they are covered with white fur and they develop enlarged digging claws on their front feet. They are 14 cm long with a 1.5 cm tail and weigh about 60 g.
These animals are found in the tundra of northern Quebec and Labrador. They feed on grasses, sedges and other green vegetation in summer and twigs of willow, aspen and birches in winter. Predators include Snowy Owls, mustelids and Arctic Foxes.
Female lemmings have 2 or 3 litters of 4 to 8 young in a year. The young are born in a nest in an underground burrow or concealed in vegetation.
They are active year round, day and night. They make runways through the surface vegetation and also dig underground burrows above the permafrost. They burrow under the snow in winter. Lemming populations go through a 3 or 4 year cycle of boom and bust. When their population peaks, lemmings disperse from overcrowded areas.
Remains of these animals dating back to the end of the last ice age have been discovered in the Ottawa valley, far south of their current range.
[edit] References
- Rodent Specialist Group (1996). Dicrostonyx hudsonius. 2006 IUCN Red List of Threatened Species. IUCN 2006. Retrieved on 12 May 2006.
