Attributes / relations provided by
♦ 1Making The Forest And Tundra Wildlife Connection♦ 2Predator–prey relationships: arctic foxes and lemmings, Anders Angerbjorn, Magnus Tannerfeldt and Sam Erlinge, Journal of Animal Ecology, Volume 68, Issue 1, Pages 34-49
♦ 3Lepus arcticus, Troy L. Best and Travis Hill Henry, MAMMALIAN SPECIES No. 457, pp. 1-9 (1994)
♦ 4Mustela frenata, Steven R. Sheffield and Howard H. Thomas, MAMMALIAN SPECIES No. 570, pp. 1-9 (1997)
♦ 5Spermophilus richardsonii, Gail R. Michener and James W. Koeppl, Mammalian Species No. 243, pp. 1-8, (1985)