Red and yellow a kill a fellow.
Red and black venom lack.
That is the poem I was taught as a kid to distinguish coral snakes from their mimics and although one should have more concrete proof than poetry before dealing with a potentially highly venomous snake, if repeated correctly it is accurate. Coral snakes have red and yellow touching. if there is red and black it is a host of copycats.
I was recently out filming on an island in the Sabine River when I caught, filmed, photographed and released this beautiful Louisiana milk snake. I have searched out snakes my whole life in this area and only found two of these and they were both in the last 90 days.