Painted Tree Iguana

Is a small to medium-sized squamate reptile characterized by a snout-vent length of approximately 55 to 70 millimeters in mature adults, complemented by a slender tail that can double its total body length. It exhibits pronounced sexual dichromatism, where males display a highly striking color pattern featuring olive-green, grayish, or brownish background tones adorned with vibrant longitudinal lateral stripes of bright yellow, orange, or intense red, which intensify during the breeding season. Females and juveniles exhibit more conservative, cryptic color patterns dominated by shades of gray and brown with dark transverse markings. Its dorsal scales are distinctly lanceolate, imbricate, and strongly keeled, giving the skin a rough texture, whereas the ventral scales are smooth and of a pale whitish or yellowish coloration.

Geographical distribution: Inhabits the temperate and forested regions of southwestern South America. It is widely distributed in Chile, ranging from the Maule Region south to the Aysén Region, including the Chiloé Archipelago and several adjacent coastal islands. In Argentina, its distribution is restricted to the Andean-Patagonian border zone, specifically within the western areas of the Neuquén, Río Negro, and Chubut provinces, representing the easternmost limits of its geographical range.

Habitat: Is closely associated with the Valdivian temperate rainforest and Andean-Patagonian forests dominated by Nothofagus species, such as coihue (Nothofagus dombeyi), lenga (Nothofagus pumilio), and ñire (Nothofagus antarctica). It prefers microhabitats characterized by an abundance of fallen logs, sun-exposed rocky outcrops, and standing tree trunks, which serve as crucial refuges from predators and as basking sites for thermoregulation within the dense understory.

Feeding: Exhibits a mostly insectivorous and opportunistic diet, although it displays notable omnivorous tendencies depending on seasonal resource availability. It feeds on a diverse range of invertebrates, including beetles, flies, spiders, insect larvae, and ants. Additionally, it supplements its diet with plant material, actively consuming small fleshy fruits of native understory plants and flowers, thereby performing an ecological role as a seed disperser.

Behavior: Is a diurnal and heliothermic species that relies heavily on solar radiation to regulate its body temperature. It displays remarkable semi-arboreal skills, climbing vertical trunks and branches with ease using its well-developed claws. During the cold autumn and winter months, it undergoes brumation beneath the bark of decaying logs or deep within rock crevices. Males are territorial and defend their home ranges through visual displays, including head bobs and body push-ups.

Reproduction: Employs a viviparous reproductive strategy, a crucial evolutionary adaptation to survive the cold, damp climates of high latitudes by bypassing the need to incubate eggs in cold soil. Mating occurs in spring following courtship, with gestation extending through the warm summer months. Females give birth to two to six fully developed offspring in late summer or early autumn, which are immediately independent and seek shelter without parental care.

Conservation status: Is globally categorized as Least Concern (LC) due to its relatively wide geographical range. However, at regional and national levels, certain populations face significant threats from native forest degradation, wildfires, the introduction of invasive exotic species, and climate change, leading to its classification as Vulnerable in specific northern portions of its distribution.