Attributes / relations provided by
♦ ¹Balda, Russell P. and Kamil, Alan, Linking Life Zones, Life History Traits, Ecology, and Spatial Cognition in Four Allopatric Southwestern Seed Caching Corvids (2006). Papers in Behavior and Biological Sciences. Paper 36.
♦ ²Oreamnos americanus, Chester B. Rideout and Robert S. Hoffman, MAMMALIAN SPECIES No. 63, pp. 1-6 (1975)