A small spotted cat from Bolivia’s Yungas cloud forests has been formally described as Leopardus tilcayo, commonly called the tilcayo. The finding is remarkable because it is reported as the first newly named and described living felid species in more than a century—not simply an older subspecies elevated to species status.
3
7
What is Leopardus tilcayo?
The tilcayo is a South American tiger cat: a group of small, spotted wildcats in the genus Leopardus. It occurs in Bolivia’s Yungas forest ecoregion on the eastern slopes of the Andes, where mountain forests meet the Amazon basin.
3
7
Its scientific name retains tilcayo, the local name for the animal. Researchers describe the cat as small and spotted, with features that drew attention when compared with other tiger cats, including irregularly large rosettes, a compact face, short rounded ears and long whiskers.
7
8
A cat thought to be a pet became a scientific clue
The discovery began with a male cat that had been found as a kitten near a forest road and kept for roughly a year by a person who believed it was an unusual domestic cat. It was later transferred to Bolivia’s Senda Verde Animal Refuge.
8
At first, the animal was regarded as a tiger cat within the historically broad concept of Leopardus tigrinus. Its appearance, however, did not fit reference animals from elsewhere in the group. That prompted closer genetic investigation rather than a classification based on markings alone.
8
How genome sequencing confirmed a new species
Researchers compared complete genomes from 38 Leopardus individuals, including 26 tiger cats from across their range and genetic material from museum specimens. The analysis placed the Bolivian tilcayo lineage on its own evolutionary branch.
4
5
The study estimated that the lineage split from its closest tiger-cat relatives about 1.4 million years ago. Together with the morphological differences, that genomic separation supported recognizing L. tilcayo as a distinct species.
7
11
This is an example of why modern taxonomy increasingly combines field observations, museum collections and genome-wide data. Similar-looking animals can belong to deeply separated lineages, while visible differences by themselves may not establish a species boundary.
Tiger cats are now understood as five species
The genomic work also revised the broader tiger-cat picture. Tiger cats were once often treated as a single wide-ranging species, but the new analysis recognizes five genetically distinct species, including L. tilcayo.
2
4
The research additionally described a Peruvian subspecies, Leopardus tigrinus antisuyo.
14
23 The larger lesson is that the diversity of South America’s small cats has been underestimated when classifications rely on sparse sampling or outward appearance alone.
Researchers have also suggested that margays could contain more than one evolutionary lineage, but that possibility remains a hypothesis requiring dedicated sampling and analysis. The available evidence does not establish a revised number of margay species.
8
Why the discovery matters for conservation
A species cannot be assessed or protected effectively if it is hidden inside the range map and population estimate of another species. Recognizing the tilcayo separately means its distribution, abundance, habitat needs and threats need to be studied on their own terms.
The tilcayo has not yet received an IUCN Red List assessment as a separate species in the available reporting. Its eventual risk category will depend on field evidence about its range, population size, fragmentation and trends.
1
7
That uncertainty is important: reports indicate that much of the animal’s basic ecology—including diet, reproduction, population size and full distribution—remains unknown.
7 If it proves to have a small or fragmented cloud-forest range, its conservation risk could be substantially different from that of a tiger cat presumed to be widespread.
The broader warning from the Yungas
The tilcayo’s identification shows that even a conspicuous group such as cats can still contain undiscovered diversity. It also highlights the value of preserving specimens, surveying poorly sampled habitats and applying genomic methods to long-standing taxonomic questions.
For conservation, the practical message is straightforward: a population that appears to be a familiar animal may be a distinct, range-restricted species. Finding that out before habitat loss or population decline becomes irreversible is the essential next step for Leopardus tilcayo.