Genetic analysis confirms Leopardus tilcayo as first new wild cat species in over a century

Key points

• Leopardus tilcayo is the first new living cat species described in more than 100 years, with the previous being the Uruguayan pampas cat in 1923.
• The species was identified through genetic analysis of 38 South American felines, revealing a lineage split from other tiger cats around 1.4 million years ago.
• The cat, measuring about 46 cm and weighing 1.4 kg, was first noticed by biologist Paola Nogales-Ascarrunz in 2016 after a local resident rescued a kitten in Bolivia.
• Conservation concerns are high as the Yungas cloud forest habitat is threatened by logging, wildfires, and mining, and the total population size is currently unknown.
• The discovery is part of a broader taxonomic reassessment, with researchers suggesting the number of recognized tiger cat species could increase from three to six or seven.

Background

Recent archival reports from September 2026 established that Leopardus tilcayo was identified through whole-genome sequencing and published in Current Biology. Earlier coverage noted that the species is likely nocturnal, preys on small rodents, and is listed as vulnerable. The discovery was initially framed as a major milestone in mammalian taxonomy, with scientists installing camera traps to estimate population numbers and inform protection efforts in the Yungas mountains near La Paz.

How outlets are covering it

Futura-Sciences emphasizes the narrative of the discovery, highlighting how a roadside rescue and subsequent genetic detective work led to the identification of a species that locals had known for generations. Science News focuses on the historical significance, noting that this is the first new living cat species described in over 100 years and quoting Jonas Lescroart on the unexpected attention the discovery has received. Mongabay provides a broader taxonomic context, with Tadeu Gomes de Oliveira arguing that the tiger-cat group is undergoing a 'genetic revolution' and that formal species recognition is crucial for conservation funding, particularly for other threatened populations like the munoai pampas cat.

Why it matters

The discovery of Leopardus tilcayo underscores the importance of genetic analysis in identifying cryptic species that may be morphologically similar but genetically distinct. It highlights the urgent need for conservation efforts in the Yungas cloud forests, where habitat loss threatens a potentially fragile population. The finding also suggests that there may be more undiscovered species in the region, emphasizing the risks of species disappearing before they are even identified.

What to watch

Researchers are planning to install camera traps to estimate the population size of Leopardus tilcayo and monitor its habitat. There is ongoing debate within the IUCN Cat Specialist Group about lowering the genetic divergence threshold for species recognition from 1 million years to 400,000 years, which could lead to the recognition of additional tiger cat species. Conservation efforts will focus on protecting the Yungas cloud forests from logging, agriculture, and mining to prevent the potential extinction of this newly discovered species.