New Grass-Green Pitviper Species Discovered in China’s Giant Panda National Park

Scientists identify Trimeresurus lii, a new venomous pitviper in China named after philosopher Laozi. Discover how genetics revealed this hidden species.

By: AXL Media

Published: Apr 22, 2026, 5:17 AM EDT

Source: Information for this report was sourced from EurekAlert!

A Jewel of the West China Rain Zone

Deep within the humid forests and misty peaks of western Sichuan, a vibrant new inhabitant has been officially recognized by science. While surveying the West China Rain Zone, researchers from the Chengdu Institute of Biology and the Giant Panda National Park discovered a pitviper species that had long been hiding in plain sight. Characterized by a grass-green body and amber eyes, the snake has been named Trimeresurus lii, or the Huaxi Green Pitviper, marking the 58th identified species within its genus.

Honoring Ancient Philosophy in Conservation

The choice of the specific name lii carries deep cultural significance. It honors Li Er, the ancient Chinese philosopher known as Laozi, whose teachings centered on the harmony between humanity and the natural world. According to the research team led by Bo Cai, this name was selected to reflect the conservation mission of the Giant Panda National Park, where the species was found. The discovery serves as a symbolic bridge between China's philosophical heritage and modern environmental preservation efforts in one of the world’s most significant biodiversity hotspots.

Genetic Clarity Overcomes Morphological Similarity

For decades, populations of the Huaxi Green Pitviper were misidentified as the bamboo pitviper (T. stejnegeri) due to their strikingly similar green appearance. However, the team utilized modern phylogenetic analysis and high-resolution morphological examinations to reveal a distinct evolutionary lineage. Beyond the DNA evidence that placed this population on its own branch of the tree of life, researchers identified specific physical traits—such as perfectly smooth head scales—that differentiate it from its more widely distributed cousins.