Phoxophrys nigrilabris — Black-lipped Shrub Lizard
Some other names for this species:
Black-lipped Eye-browed Lizard
At first glance, I thought this adorably cute sleeping lizard was another of the Dusky Earless Agamas that I had seen so often in Malaysia. But the proportions seemed off: the head was too big, and the tail a little short, and the body a little bulky. Back at my room the next day, I consulted the books I had brought and guessed that it was Phoxophrys nigrilabris instead. Later I had this opinion confirmed by a knowledgeable herpetologist.
Apparently this species is equally happy sleeping horizontally or vertically.
Or even sleeping at a 45-degree angle.