Overview
Described in 2015 from the hyper-diverse Chocó rainforests near Alto Tambo in northwestern Ecuador, Enyalioides altotambo is a spectacularly armored hoplocercid woodlizard. Resembling a miniature dragon, this arboreal reptile is distinguished from its close Andean relatives by vivid emerald scales, a prominent vertebral crest, and distinct scale geometry.
Biology and Physical Characteristics
Adult males showcase brilliant emerald-green to iridescent turquoise dorsal scales accented with subtle yellowish undertones. A continuous, serrated vertebral crest composed of enlarged spinose scales runs from the nape down the spine to the base of the tail. The throat possesses a distinctive circular black patch framed by white scales, and the head is large and heavily armored with pointed scales, housing powerful jaw musculature.
Behavior and Ecology
Diurnal and primarily semi-arboreal, spending its daylight hours foraging along low tree trunks, buttress roots, and horizontal vines within 1 to 3 meters of the forest floor. When threatened, rather than fleeing immediately, it freezes against mossy bark or slips deftly around to the opposite side of the trunk. At night, it sleeps perched vertically on slender saplings or hanging vines above ground-dwelling predators.
Conservation and Human Impact
Assessed as Endangered due to the alarming rate of deforestation across the Ecuadorian Chocó. Intensive commercial palm oil plantation expansion, cattle ranching, and road construction through Esmeraldas province have fragmented the primary lowland and premontane rainforests to which this lizard is strictly confined.
Interesting Factoid
Despite reaching nearly a foot in length with its spiny dragon-like crest and striking coloration, the Alto Tambo Woodlizard remained completely unknown to science until herpetologists conducted targeted surveys in the dense Chocó canopy in 2015.
Last updated: October 2026