### Identification The Red-lipped Pricklenape (*Acanthosaura rubrilabris*) is a medium-sized, dragon-like agamid that looks as though it stepped out of a prehistoric myth. Its most striking field mark is the vivid vermillion or cherry-red coloration along the labial scales (the "lips"), contrasting sharply against a body of mottled moss-greens, earthy browns, and slate greys. Look for a dramatic "crown" of elongated nuchal spines on the back of the neck, followed by a distinct gap before the dorsal spines begin. Unlike the similar *A. capra*, this species is more slender, and its spines are notably more needle-like. Its eyes are large and gold-flecked, with a dark bar often running through the orbit to provide exceptional camouflage against bark.
### Habitat & Range This species is a specialist of the humid, montane evergreen forests of Central Vietnam, particularly within the Ngoc Linh mountain range. You’ll find them at elevations between 1,000 and 2,000 meters, where the air is perpetually cool and misty. They favor primary forests with high humidity and thick blankets of moss; an observer should scan vertical tree trunks and low-hanging branches near mountain streams where the vegetation is densest.
### Behaviour The Pricklenape is a "sit-and-wait" specialist. Diurnal by nature, it spends hours motionless on a vertical trunk, head pointed downward, relying on its exquisite camouflage to vanish against the lichen. If threatened, it won't flee immediately; instead, it compresses its body and freezes. During the breeding season, males become more territorial, utilizing rhythmic head-bobbing and throat-distension to signal to rivals or attract mates.
### Diet An opportunistic carnivore, *A. rubrilabris* feeds primarily on forest-floor invertebrates. It watches from its perch before dropping suddenly to snatch up crickets, earthworms, or large forest roaches. They are also known to occasionally take smaller lizards or amphibians if the opportunity arises.
### Fascinating Fact While many lizards use bright colors to attract mates, the "red lipstick" of the Pricklenape may serve a dual purpose: when an intruder gets too close, the lizard flashes its mouth open. The sudden burst of internal pink and external red acts as a "startle display," momentarily confusing a predator just long enough for the lizard to vanish into the undergrowth!