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Scientists discover new lizard species in Peru's extreme highlands

Researchers have identified a previously unknown lizard species in the Andes mountains at altitudes exceeding 4,800 metres, where oxygen levels present a significant challenge to most organisms. The diminutive reptile exhibits distinctive sexual dimorphism and makes its habitat among rocky outcrops.

LSN India · 5 October 2026

Scientists discover new lizard species in Peru's extreme highlands

Scientists working in Peru's Andean highlands have documented a new lizard species adapted to one of Earth's most inhospitable environments. The discovery was made at elevations surpassing 4,800 metres, where atmospheric oxygen levels are considerably reduced and temperatures remain harsh throughout the year.

The newly identified species measures between 6 and 8 centimetres in length, making it a relatively small reptile. Unlike many larger lizard varieties, this species has evolved to thrive in the rocky terrain characteristic of high-altitude Andean landscapes, sheltering among stone crevices and outcrops.

A notable feature of the species is pronounced sexual dimorphism, with males and females displaying distinct markings on their bodies. This physical differentiation suggests evolutionary adaptations related to mating behaviours and territorial recognition in their high-altitude habitat.

The discovery adds to the growing catalogue of specialized fauna that survive in extreme mountain environments. The Andes, stretching across multiple South American nations, continues to yield new species discoveries as researchers expand biological surveys in remote alpine zones.