Capybara Census: Bolivia’s Historical Regulation on Domestic Rodents

In certain regions of Bolivia during the early 1900s, local lore speaks of a curious animal regulation that purportedly mandated residents to declare their domestic capybaras to municipal authorities. Capybaras, the world’s largest rodents native to South America’s wetlands, were often kept near households due to their docile nature. Though official documents are scarce, this regulation is said to have been introduced as a means to monitor and control the population of these semi-aquatic animals, which were sometimes considered nuisances or risks to crops. The rule may have required owners to register each capybara, possibly including details about their enclosure and feeding. While this law sounds unusual from a modern perspective, it underscores Bolivia’s historical efforts to balance human habitation with native wildlife management. Given limited documentation, it remains uncertain how widely this regulation was enforced or how many citizens complied. Nevertheless, the story persists in local oral histories, reflecting the unique relationship Bolivians once had with the capybara beyond the usual farm animals.