Attributes / relations provided by
♦ 1USDA Plants Database, U. S. Department of Agriculture
♦ 2Plants For A Future licensed under a
Creative Commons Attribution 4.0 License♦ 3Kattge, J. et al. (2011b)
TRY - a global database of plant traits Global Change Biology 17:2905-2935
♦ 4Bighorn Sheep Diet Selection and Forage Quality in Central Idaho, Guy D. Wagner and James M. Peek, Northwest Science, Vol. 80, No.4, 2006, pp. 246-258
♦ 5Tamias dorsalis, E. Blake Hart, MAMMALIAN SPECIES No. 399, pp. 1-6 (1992)
♦ 6Tamias ruficaudus, Troy L. Best, MAMMALIAN SPECIES No. 452, pp. 1-7 (1993)
♦ 7Spermophilus columbianus, Charles L. Elliott and Jerran T. Flinders, MAMMALIAN SPECIES No. 372, pp. 1-9 (1991)
♦ 8National Geographic Magazine - May 2016 - Yellowstone - The Carnivore Comeback