Attributes / relations provided by
♦ ¹Sexual dimorphism in head shape and diet in the cottonmouth snake (Agkistrodon piscivorus), Shawn E. Vincent, Anthony Herrel and Duncan J. Irschick, J. Zool., Lond. (2004) 264, 53–59
♦ ²PREY HANDLING AND DIET OF LOUISIANA PINE SNAKES (PITUOPHIS RUTHVENI) AND BLACK PINE SNAKES (P. MELANOLEUCUS LODINGI), WITH COM- PARISONS TO OTHER SELECTED COLUBRID SNAKES, D. Craig Rudolph, Shirley J. Burgdorf, Richard N. Conner, Christopher S. Collins, Daniel Saenz, Richard R. Schaefer, Toni Trees, C. Michael Duran, Marc Ealy, John G. Himes, Herpetological Natural History, 9(1), 2002, pages 57-62