It would be wise to have more information than that as you need to understand how to identify the 5 venomous snakes in Missouri and how to avoid them. What many don't understand is that all snakes that are native to Missouri are protected and it's illegal to kill them according to the Department of Conservation. There are 5 exceptions and that includes the following venomous snakes when they are close to people. Eastern Copperhead — Agkistrodon contortrixCanva CanvaThe Eastern Copperhead has a tan or light brown body marked with 10 to 18 darker, hourglass-shaped crossbands with a wide triangular head with a coppery-red tint. They have lost much of their habitat in Missouri and are the one venomous snake you are least likely to encounter.