Thamnophis sirtalis sirtalis Eastern Garter Snake Kenneth L. Krysko photo.
Adults are greenish with a light tan or gray mid-dorsal stripe .
There is an additional light tannish stripe on each side of the body occupying the 2nd and 3rd dorsal scale rows above the belly. The belly is uniform whitish-green. The scales of the upper lip are outlined with black markings. The scales are keeled , and there are 19 dorsal scale rows at midbody. The pupil is round.