Leopardus tilcayo: The First New Cat Species Discovered in Over a Century

Wildlife enthusiasts in India recently saw a spike in searches for "tiger cat" and "cat" following a landmark scientific discovery in South America. A study published in the journal Current Biology on September 17, 2026, formally described Leopardus tilcayo, marking the first time a new species of felid (the cat family) has been discovered in more than 100 years [1].

From a "Weird Cat" to a Scientific Breakthrough

The journey to identifying Leopardus tilcayo began in 2017 when a local man in Bolivia found a kitten on a road near a forest. Believing it was a domestic breed, he kept it for a year before realizing the animal was wild and transferring it to the Senda Verde wildlife sanctuary. Biologist Paola Nogales‑Ascarrunz was intrigued by the creature's small, scrunched‑up face, round ears, and leopard‑like spots [1].

Initially, researchers assumed the cat belonged to the Leopardus tigrinus species (commonly known as tiger cats or oncillas). However, by 2019, Nogales‑Ascarrunz noticed that the cat's rosettes were significantly larger than those of similar cats in neighboring Brazil. This visual discrepancy prompted a deeper genetic investigation.

How Genomics Redrew the Family Tree

While physical traits like tail length and teeth shape provide clues, the team used complete genomic analysis of 38 individuals across the Leopardus genus to confirm the discovery. The results revealed that Leopardus tilcayo is not just a variation, but a distinct species that diverged from its relatives approximately 1.4 million years ago [1].

This discovery has a ripple effect on how scientists classify small wild cats. What was once considered a single species of tiger cat (Leopardus tigrinus) has now been split into five distinct species. The study also proposed a new Peruvian subspecies, Leopardus tigrinus antisuyo, and suggested that the margay may actually consist of four separate species, though this remains a hypothesis pending further genomic work.

Why This Matters for Conservation

The reclassification of one species into five has immediate implications for wildlife protection. Conservation status is often tied to geographic distribution; a species thought to range from Brazil to Costa Rica might not seem endangered, but five smaller, localized populations are far more vulnerable.

Feature	Previous Understanding	New Finding (2026)
Tiger Cat Species	Single species (L. tigrinus)	Species complex of 5 distinct species
Last New Felid Discovery	Pampas cat (1923)	Leopardus tilcayo (2026)
Divergence Time	Unknown/Grouped	~1.4 million years ago

Currently, Leopardus tilcayo is known to inhabit Bolivia's Yungas forest ecoregion on the eastern slope of the Andes Mountains. However, scientists note that basic details regarding their diet, reproduction, and total wild population size remain unknown, making urgent further research essential for their survival.