Look at the general coloration of the body.
The body is melanistic, patternless.
The body is not melanistic: only dorsal ground coloration black with distinct light pattern.
The dorsal ground coloration of body is greenish-yellow, green, or bluish-green.
body coloration | |_ dorsal pattern {body melanistic, patternless , dorsal ground coloration of body greenish-yellow, green or bluish-green} | |_ dorsal ground coloration and pattern {body melanistic, patternless , body not melanistic, only dorsal ground coloration black with disctinct light pattern} | |_ throat coloration and pattern {body melanistic, patternless} | |_ tail coloration {body melanistic, patternless , dorsal ground coloration of body greenish-yellow, green or bluish-green} | |_ snout tip coloration {body melanistic, patternless , dorsal ground coloration of body greenish-yellow, green or bluish-green} | |_ gular scales {body melanistic, patternless , dorsal ground coloration of body greenish-yellow, green or bluish-green} | |_ cranial scales {body not melanistic, only dorsal ground coloration black with disctinct light pattern , dorsal ground coloration of body greenish-yellow, green or bluish-green} | |_ ventral scales {body not melanistic, only dorsal ground coloration black with disctinct light pattern} | |_ number of transverse rows of ventral scales (1) {body not melanistic, only dorsal ground coloration black with disctinct light pattern , dorsal ground coloration of body greenish-yellow, green or bluish-green} | |_ number of scales from rictus to rictus {body not melanistic, only dorsal ground coloration black with disctinct light pattern , dorsal ground coloration of body greenish-yellow, green or bluish-green} | |_ number of transverse rows of ventral scales (2) {body melanistic, patternless , dorsal ground coloration of body greenish-yellow, green or bluish-green} | |_ number of transverse rows of ventral scales (3) {body melanistic, patternless , body not melanistic, only dorsal ground coloration black with disctinct light pattern}