<b>Liolaemus melanopleurus</b>, also known as the black-backed lizard, is a 10 to 15 cm insectivorous species native to the temperate forests and grasslands of Patagonia, characterized by its dark gray to black dorsal coloration, agility in rocky terrains, and important role in controlling insect populations within its ecosystem. This resilient lizard exhibits fascinating behavioral traits, including territorial displays and thermoregulation through sun basking.