Attributes / relations provided by
♦ 1DIET OF NORTHERN SAW-WHET OWLS IN SOUTHERN WISCONSIN, SCOTT R. SWENGEL AND ANN B. SWENGEL, The Condor 94:707-711 (1992)
♦ 2Diet of the Timber Rattlesnake, Crotalus horridus, Rulon W. Clark, Journal of Herpetology, Vol. 36, No. 3, pp. 494-499, 2002
♦ 3Resources of a Snake Community in Prairie-Woodland Habitat of Northeastern Kansas, Henry S. Fitch, U.S Fish and Wildlife Service, Wildlife Research Report 13: 83-98 (1982)