We gratefully acknowledge friends and colleagues for various courtesies, including field work in Mexico and Texas, sharing information or photographs, providing copies of publications, allowing us to photograph live specimens in their care, or review of website content:  

Linda Acker, Kraig Adler, Ivan Trinidad Ahumada Carrillo, Brad Alexander, Luis Almaraz, David Barker, Breck Bartholomew, Richard Bartlett, Doug Beckwith, Dave Blody, Shannon Brown, Robert Bryson, Frank Burbrink, Tim Burkhardt, Rubén Carbajal, Eric Centenero Alcalá, John Craft, Harold De Lisle, Curtis Eckerman, Robert Edwards, Gustav Eloy, Martin Feldner, Travis Fisher, Joseph Forks, Uri García, Tim Gebhard, Andrew Godambe, Dan Grubb, Chris Grünwald,  Robert Haase, Steve Hammack, Charles Heim, Dennis Herman, Terry Heuring, Michael Heyduk, Terry Hibbitts, Troy Hibbitts, Gero Hilken, Matt Ingrasci, Jerry Johnson, Jason Jones, Alan Kardon, Mike Kochvar, Gunther Köhler, Polly Lasker, John Lassiter, David Lazcano, Casey Lazik, Sandra Leyva, Randy Limburg, the late Ernest Liner, Dave Long, Paul Lynum, Bobby MacGregor, Aaron Mattson, Erik McCormick, Andrés Alberto Mendoza-Hernández, the late Fernando Mendoza-Quijano, Gerold Merker, James Murphy, Chris Newsom, Brendan O'Connor, Charles Painter, Richard Phillips, Louis Porras, Michael Price, Gustavo Quintero-Diaz, Roger Repp, Jacobo Reyes Velasco, Dusty Rhoads, Chris Rodriguez, Andrea Roth-Monzón, Gerry Salmon, Ron Savage, Jake Scott, Frank Slavens, Colin Smith, the late Hobart Smith, Gary Swinford, Alan Tennant, Sergio Terán-Juárez, Blake Thomason, Daniel Thompson, Kyle Vargas, Matthew Vaughan, Dan Vermilya, Ivan Villalobos, Robert Webb, Chad Whitney, Larry David Wilson, and Richard Worthington.

Joseph Forks and Gerard Salmon, long-time students of Mexicana kingsnakes, have accumulated a tremendous amount of data on the complex, most of it as yet unpublished. All those with an interest in these snakes owe Joe and Gerry a debt of gratitude. 

Special thanks to Brad Alexander for his creative assistance in bringing this website to life.