Choose the description that best fits the animal of interest.  If none
fit go back to step 2B.

22a.  brown, grey or reddish on back, distinct dorsolateral ridges, mask
through eye and ear, light line along upper edge of jaw

                    go to question 23

22b.  green or brown on back, dorsolateral ridges light coloured, large
distinct spots surrounded by contrasting ring, light line along upper
edge of jaw

                    go to question 24

22c.  green or brown on back, dorsolateral ridges indistinct, partial or
absent, upper jaw usually bright green, no light line along upper edge of
jaw, patterning indistinct or irregular, males have yellow throat and
eardrum larger than eye

                    go to question 25