The conservation story of Punta San Juan is deeply intertwined with Peru’s history. For centuries, guano – a natural fertiliser made from seabird droppings – was a critical resource for agriculture in coastal societies. These communities harvested guano sustainably, transporting it to the Andes to fertilise their fields. The Spanish naturalist Alexander von Humboldt introduced guano to Europe in the 19th century, sparking a global trade boom. Peru’s guano islands became a sought-after commodity, but unregulated exploitation devastated seabird colonies and local ecosystems.

By 1909, the guano industry had depleted Peru’s reserves, leaving the government with a stark choice: continue unsustainable practices or protect the remaining guano-producing seabirds. The decision to establish the Compañía Administradora del Guano (CAG), a semi-official Peruvian company formed to manage and sell guano, marked the beginning of Peru’s conservation efforts. Coastal peninsulas like Punta San Juan were walled off to protect seabird colonies from predators, while guards ensured that guano was only harvested during non-breeding seasons. These measures sparked a remarkable recovery, with guano bird populations soaring from fewer than five million in 1909 to over 50 million by the 1950s. Today, through over a century of dedicated conservation, Punta San Juan serves as a living testament to the power of protection, resilience, and the long-term commitment needed to restore biodiversity.

Punta San Juan is often described as a ‘mega zoo’. Unlike traditional zoos where animals are confined, this reserve allows wildlife to thrive in their natural habitat under physical protection. For nearly four decades, researchers have studied Punta San Juan’s ecosystem, making it one of the most well-documented conservation sites in Peru. The reserve’s rugged cliffs, sandy beaches, and rocky outcrops provide perfect vantage points for observing seabirds, sea lions, and fur seals without disturbing them.

The reserve’s success is evident in the diversity of species that call it home. Humboldt penguins, Peruvian boobies, guanay cormorants, Peruvian pelicans, and Inca terns all nest on the peninsula. Sea lions and fur seals bask on the beaches, while guano enriches the surrounding waters, supporting fish, invertebrates, and kelp forests. This intricate web of life highlights the interconnectedness of land and sea, a hallmark of Punta San Juan’s ecological importance. The marine ecosystem surrounding Punta San Juan is equally remarkable. It sits within the Humboldt Current, one of the most productive marine systems in the world. Coastal upwelling brings nutrient-rich waters to the surface, fuelling the growth of plankton and sustaining vast populations of anchoveta, the primary prey for seabirds and marine mammals. This biological abundance has made Punta San Juan a haven for species reliant on the ocean’s bounty.