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

Linda Acker, Kraig Adler, Brad Alexander, Luis Almaraz, David Barker, Breck Bartholomew, Richard Bartlett, Dave Blody, Shannon Brown, Robert Bryson, Frank Burbrink, Tim Burkhardt, Eric Centenero Alcalá, Harold De Lisle, Curtis Eckerman, Martin Feldner, Travis Fisher, Joseph Forks, Uri García, Tim Gebhard, 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, John Lassiter, David Lazcano, Sandra Leyva, Randy Limburg, Ernest Liner, Dave Long, Paul Lynum, Bobby MacGregor, Aaron Mattson, Erik McCormick, Andrés Alberto Mendoza-Hernández, Fernando Mendoza-Quijano, Gerold Merker, James Murphy, Chris Newsom, Brendan O'Connor, Charles Painter, Louis Porras, Michael Price, Gustavo Quintero-Diaz, Roger Repp, Jacobo Reyes Velasco, Chris Rodriguez, Andrea Roth-Monzón, Gerry Salmon, Ron Savage, Colin Smith, Hobart Smith, Blake Thomason, Matthew Vaughan, Dan Vermilya, 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students of Mexicana kingsnakes, have accumulated a tremendous amount of data on the complex, most of it as yet unpublished.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.