Attributes / relations provided by
♦ 1The Cactus Ferruginous Pygmy-Owl: Taxonomy, Distribution, and Natural History, Jean-Luc E. Cartron, W. Scott Richardson, Glenn A. Proudfoot, USDA Forest Service Gen. Tech. Rep. RMRS-GTR-43. 2000
♦ 2Sylvilagus audubonii, Joseph A. Chapman and Gale R. Willner, MAMMALIAN SPECIES No. 106, pp. 1-4 (1978)
♦ 3Sylvilagus bachmani, Joseph A. Chapman, MAMMALIAN SPECIES No. 34, pp. 1-4 (1974)
♦ 4Tamias merriami, Troy L. Best and Nancy J. Granai, MAMMALIAN SPECIES No. 476, pp. 1-9 (1994)