Deep in northeastern Iberia, in deposits nearly 4.4 million years old, researchers have uncovered the skeletons of half-ton cattle relatives that mark a pivotal moment in bovine evolution—the first large-bodied members of a lineage that would eventually give rise to the buffalo, bison, and cattle we know today.
Leonardo Sorbelli and colleagues at the Leibniz Institute for Evolution and Biodiversity Science in Germany made this discovery at Camp dels Ninots, where the exceptional preservation of multiple near-complete skeletons has provided an unusually detailed window into the Early Pliocene world. The fossil record of early bovines has long been fragmentary and incomplete, making it difficult for scientists to trace how these animals evolved and spread across continents. This cache of remains changes that picture dramatically.
The team identified at least 14 individual animals belonging to a species called Parabos tigneresi, part of a group of five buffalo-like bovids that roamed Europe during the Early Pliocene. The largest specimens weighed up to nearly 500 kilograms—about half a ton—making them smaller than most modern cattle breeds but substantially larger than any other similar bovid living at the time. This size represents a crucial turning point: Parabos tigneresi marks the beginning of the age of large bovines, an evolutionary development that may have been driven by the dramatic climatic and environmental shifts reshaping Europe during the Pliocene epoch.
The anatomy of these preserved animals tells a story of adaptation to their surroundings. Their skeletal structure suggests they were built for a life in humid, vegetation-dense environments—which aligns perfectly with what the geological record tells us about Camp dels Ninots itself, a site centered around an ancient lake surrounded by lush vegetation. These early bovines were not creatures of open grasslands or arid regions, but specialized inhabitants of wetter, more forested terrain. Understanding where they lived helps us understand how they survived and thrived during a period of major environmental upheaval.
Yet mysteries remain. The researchers cannot yet say with certainty where Parabos fits into the grand family tree of bovines. The animals could represent the earliest members of the tribe Bovini—the direct ancestors of today's buffalo, cattle, and bison—or they might be the last surviving members of an older lineage called Tragoportacini, one that would eventually be replaced by the true Bovini. Future studies of their anatomy and ecology may answer this question definitively.
What is certain is the significance of what these fossils reveal. As Sorbelli and his team note in their paper, published June 3, 2026, in PLOS One, "The bovids from Camp dels Ninots are among the most exquisite fossils from the Pliocene of Europe. The exceptional preservation of these animals has allowed us to better understand their anatomy and, therefore, the ecology of the first large-sized bovids to populate the continent." The abundance and quality of the remains provide a rare gift to paleontologists—data of a kind that typically vanishes into time, lost to the ravages of geology and decay. In this case, the story of how Europe's largest bovines came to be is being written clearly enough for us to read, four million years later.