Scientists Identify First New Wild Cat Species in 100 Years: The Tiny Tilcayo Tiger Cat

For the first time in a century, scientists have formally described a new species of wild cat. The tilcayo tiger cat, now known as Leopardus tilcayo, was discovered in the Bolivian Yungas, according to reporting by NBC News and Scientific American. The announcement marks a rare event in modern taxonomy: the identification of an entirely new mammal species, and one that belongs to the famously well-studied cat family.

A Kitten-Sized Predator

The tilcayo tiger cat is a spotted, slender animal roughly the size of a domestic kitten rather than a full-grown house cat. That diminutive stature initially caused confusion. Paola Nogales-Ascarrunz, who leads the Bolivian Felid Research and Conservation Program (Programa de Investigación de Félidos Bolivia), recalled that a man brought the animal to a wildlife rehabilitation center believing it was a lost domestic kitten.

“I saw this cat. It was really, really small, and I couldn’t believe how small it was,” Nogales-Ascarrunz told NBC News. “I thought it was a kitten.”

She described the find as a “novel” event. “This time, it’s a cat. That’s really novel. And it hasn’t happened in 100 years,” she said. “No one else had named it. No one else had described it.”

Genetic Analysis Confirms a Distinct Lineage

According to Scientific American, the study that confirmed the species analyzed the genomes of 38 cats, including 26 from the genus Leopardus. The research was described by co-lead author Jonas Lescroart, an evolutionary ecologist at the University of Antwerp in Belgium, as “the most complete genetic study yet” of the group. Scientific American noted that it is even rarer to find an entirely new species rather than a variation of a known one.

South America is home to as many as five tiger cat species, all of which face severe conservation challenges due to disappearing habitat. The exact population size of the tilcayo tiger cat remains unknown.

Conservation Questions Remain

Nogales-Ascarrunz emphasized that the lack of population data is a critical gap. “We really don’t know how many cats are still in the wild,” she said. “We need science, we need more studies to answer this question, which is actually critical for its conservation.”

The discovery also underscores the ecological importance of the Yungas forests. “Describing a new cat species after more than 100 years shows how much we still have to learn about the biodiversity around us,” Nogales-Ascarrunz said. “But it also reminds us that we need to protect the Yungas forests, which are home to so many species — including some we are only beginning to understand.”

A Rare Find in a Well-Known Family

While new insects and microorganisms are described regularly, the identification of a new mammal — and particularly a new cat — is an exceptional event. The last time a new wild cat species was named was a century ago. The tilcayo tiger cat now joins the ranks of South America’s small spotted cats, a group that has long posed taxonomic puzzles for biologists.

The study’s authors hope the formal description will spur further research and protective measures for the species and its shrinking habitat. For now, the tilcayo tiger cat remains as elusive as it is small, a reminder that even in a world of satellite maps and genetic sequencing, undiscovered corners of the natural world persist.

Source: www.breitbart.com — https://www.breitbart.com/science/2026/09/17/scientists-discover-new-wild-cat-species-for-first-time-in-100-years/