Google AI:
A green crested lizard sheds its skin in small pieces, not as a whole like a snake, and you might notice a duller appearance on their skin, indicating they are about to shed; this shedding process helps them grow and replace damaged skin, and they typically eat the shed skin afterwards as a way to regain nutrients.
When spotted, this Green Crested Lizard was perhaps in the midst of getting rid of the last of its old skin, and its prolonged motionless stance was only comprehensible when the calls of a nearby Green-billed Malkoha was discernible.