12f Mane said:
"Texas" and "western" are the same thing. There was a taxonomic change a few years ago that separated the American ratsnakes into species (they were previously all the same species, just broken out into subspecies). Our Texas ratsnakes got renamed Western. I'm personally not a fan of the name change or taxonomic change, and it's a common thing in herpetology at the moment.
That said, western ratsnakes and great plains (southwestern) ratsnakes are different species, and at the moment slowinski's ratsnakes are separated as well.
Western (previously Texas) Ratsnake
Great Plains (Southwestern) Ratsnake
Slowinki's (corn) Ratsnake
I understand the Texas vs. Great Plains ID, but how to I differentiate between the Great Plains and the Corn? I can't tell any noticeable differences in the markings.