Attributes / relations provided by
♦ 1Sylvilagus audubonii, Joseph A. Chapman and Gale R. Willner, MAMMALIAN SPECIES No. 106, pp. 1-4 (1978)
♦ 2Feeding ecology of North American gopher snakes (Pituophis catenifer, Colubridae), JAVIER A. RODRÍGUEZ-ROBLES, Biological Journal of the Linnean Society, 2002, 77, 165183
♦ 3Sylvilagus nuttallii, Joseph A. Chapman, MAMMALIAN SPECIES No. 56, pp. 1-3 (1975)
♦ 4Spermophilus townsendii, Eric A. Rickart, MAMMALIAN SPECIES No. 268, pp. 1-6 (1987)