Attributes / relations provided by
♦ ¹Making The Forest And Tundra Wildlife Connection
♦ ²Lepus arcticus, Troy L. Best and Travis Hill Henry, MAMMALIAN SPECIES No. 457, pp. 1-9 (1994)
♦ ³Microtus miurus (Rodentia: Cricetidae), F. RUSSELL COLE AND DON E. WILSON, MAMMALIAN SPECIES 42(855):75–89 (2010)
♦ ⁴Mustela frenata, Steven R. Sheffield and Howard H. Thomas, MAMMALIAN SPECIES No. 570, pp. 1-9 (1997)
♦ ⁵Sciurus niger, John L. Koprowski, MAMMALIAN SPECIES No. 479, pp. 1-9 (1994)