Half the length of its Pyrenean relative, there remains some debate whether or not the Portuguese ibex was a subspecies or a species of its own. Hunted by mountain-dwelling locals for meat, its ornamental horns, and the seemingly magical stone-like bezoars found in the animal's gastrointestinal tract, its decline tracks the spread and advancement of firearms. There is little doubt that the Cabro's only significant enemy was Man, writes David Day in The Doomsday Book of Animals: A Natural History of Vanished Species (1981). The last known Portuguese ibex died in 1890, although a lone female was spotted near the Serra do Gerês in 1892.