This a tundra (treeless areas of Northern Canada) herbivore rodent, between 10-15 centimeters long, and weighting around 80 grams.
Every 5 weeks, the female can give birth to about 8 young!
It´s the main sustenance for arctic foxes, ermines, snowy owls, jaegers (any of 3 species of rapacious, sea-bird of genus Stercorarius) and gyrfalcons (Falco rusticolus).
Lemmings´ Mass Suicide: A MYTH
By Robert Leighton for The New Yorker
