We have coral snakes in SE Oklahoma. They are actually the Texas coral snake, but they are in parts of Ok along the Red River.
"North Texas has the same venomous snakes as Oklahoma with one addition, the Texas coral snake, which also might be rarely found near the Red River in extreme southern Oklahoma. The coral snake is not a pit viper- it is a member of the cobra family, Elapidae. It is a relatively slender snake with black and red bands separated by yellow bands and a black nose. In similarly colored non-venomous snakes, the red and yellow bands are separated by black bands or they lack a black nose."
https://www.noble.org/news/publicat...2008/june/learn-to-recognize-venomous-snakes/
lol... I googled that exact same page to confirm that they're not native to Oklahoma.