Description: 11¾ - 20 inches. Smooth Green Snakes are usually bright green, but may rarely be tan. The belly is light yellow. Hatchling Smooth Green Snakes are darker in appearance and may be olive green, gray, or even blueish. Similar Species: Smooth Green Snakes may be confused with Racers in pictures, but young Racers within the size range of Smooth Green Snakes will have a blotched appearance rather than being a solid color. Tan colored Smooth Green Snakes may be confused with Smooth Earth
Opheodrys vernalis (smooth green snake) - a photo on Flickriver
Smooth Green Snake (Opheodrys vernalis) - Psychotic Nature
Smooth Green Snake - Encyclopedia of Life
Smooth Greensnake (Opheodrys vernalis) - Indiana Herp Atlas
Smooth Green Snake (Opheodrys vernalis) - Reptiles and Amphibians of Iowa
Kansas Herpetofaunal Atlas
Smooth Greensnake (Opheodrys vernalis) - Amphibians and Reptiles of South Dakota
Opheodrys vernalis · Earth@Home: Biodiversity
Smooth Greensnake (Opheodrys vernalis) – Amphibians and Reptiles of Iowa
Smooth Green Snake - HRM