Life Spans of Mammals, Birds, Amphibians, Reptiles, and Fish
Agkistrodon contortrix laticinctus (Broad-banded copperhead)
Bowler, J.K., 1975. Longevity of reptiles and amphibians in N. American collections as of 1 November, 1975. Society for the Study of Amphibians and Reptiles, Miscellaneous Publications, Herpetological Circular 6:1-32.