The tiny pig once thought extinct is making a surprising comeback

Nature · Published 2 October 2026 Swipe more like this →

In short: Once believed to be lost forever, the pygmy hog is a microscopic marvel of evolution. As the world's smallest pig, this Indian endemic has survived through rediscovery and intensive breeding efforts, defying the odds to reclaim its place in the Himalayan foothills.

The pygmy hog (Porcula salvania) is a remarkable suid endemic to the alluvial grasslands of India's Himalayan foothills. Standing only 20–25 cm tall from hoof to shoulder, it is the smallest pig species in existence, with adults weighing between 6.6 and 9.7 kg. Its survival has been precarious; due to habitat destruction from human encroachment and annual grassland fires, the species was feared extinct in the early 1960s. However, a small population was rediscovered in 1971 near the Barnadi Wildlife Sanctuary in Assam while fleeing a fire.

Taxonomically, the pygmy hog has been a subject of scientific debate. In 1847, Brian Houghton Hodgson first described the species, arguing it belonged to a unique genus due to its distinct skull and dental features. While later researchers challenged this, suggesting its traits were merely superficial results of its small size and reclassified it under the genus Sus, modern science has settled the matter. A 2007 genetic analysis of three mitochondrial DNA loci confirmed that the pygmy hog is indeed a distinct genus, Porcula, acting as a sister lineage to the Sus genus.

Today, the species remains critically endangered, with populations concentrated in Manas National Park and other Assam reserves. Conservation is a high-stakes race involving captive breeding and 'soft release' programs. In these programs, hogs are pre-conditioned for five months in simulated natural environments to master essential behaviors like nest-building and foraging. While the wild population has seen fluctuations—estimated at 250 in 2013 and roughly 420 in 2024—the total population, including those in breeding centers, stands at approximately 515 individuals.

These social animals live in small family groups, often consisting of one or two females and their offspring, though groups can reach 20 individuals. They are vital to their ecosystem, using their snouts to dig for food, which helps spread seeds and improve soil quality. Despite these efforts, they face ongoing threats from livestock grazing, poaching, and the continued loss of their specialized grassland habitats.

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