How to ID a Black Racer vs Black Rat Snake. What is the difference?

I resuced a Black Racer and took it to the Chattanooga Zoo reptile rescue center after taking the opportunity to show its features and explain how to distinguish Black Racer Snakes( Coluber constrictor) from Black snakes (Pantherophis alleghaniensis). Black Racer vs Black Rat Snake. Comparing snakes! Learn how to tell these snakes a part. Black Racers and Black Rat Snakes are different snakes, are different species. Know and learn how to tell them apart in this video.