Matt:
All snakes of the genus Lampropeltis are “kingsnakes.” Members of one species, L. triangulum, are referred to as “milksnakes.” However, L. triangulum, as presently constituted, ranges from Canada to Ecuador and is a taxonomic mess. In reality, there are a number (who knows how many) of distinct species hiding under the name L. triangulum, but it will take a considerable amount of research to determine where these species boundaries fall. Further complicating matters is the probability that some Mexican members of L. “triangulum” are more closely related to snakes of the L. mexicana complex than they are to U.S. milksnakes. Bottom line is that they’re all “kingsnakes.” The next few years should see increased research into the relationships among species of Lampropeltis and a likely increase in the number of reconigized species. Hope this helps.
Cheers,
Bob Hansen
rwh13@csufresno.edu