Río Abiseo National Park

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Exploring the Biodiversity Hotspot: Río Abiseo National Park

The Río Abiseo National Park, nestled within the San Martín department of Peru, stands as a testament to the rich tapestry of biodiversity that exists in the Andean region. Established in 1983, this protected area was inscribed as a UNESCO World Heritage Site in 1990, recognizing its unique combination of natural and cultural heritage.

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UNESCO Description of the World Heritage Site

The park was created in 1983 to protect the fauna and flora of the rainforests that are characteristic of this region of the Andes. There is a high level of endemism among the fauna and flora found in the park. The yellow-tailed woolly monkey, previously thought extinct, is found only in this area. Research undertaken since 1985 has already uncovered 36 previously unknown archaeological sites at altitudes of between 2,500 and 4,000 m, which give a good picture of pre-Inca society.

UNESCO Justification of the World Heritage Site

Criterion (iii): The Pre-Hispanic monuments in the valley of Monte Cristo inside the Abiseo River National Park are outstanding examples of prehispanic adaptation, evolution and human settlement in the high altitude cloud forests of the Peruvian Andes Amazon basin, as early as 6,000 BC, evidenced by the Manachaqui cave, until mid-sixteenth century. The extensive and remarkably complete remains are of great importance for the understanding early human occupation in the Andean region.

Criterion (vii): Situated in a remote part of the tropical Andes, Río Abiseo National Park harbors entire unspoiled river basin covered by dense and lush forests. Towards the higher elevations, the terrain becomes increasingly rugged and deeply dissected. Eventually cloud forests give room to Andean Paramo grasslands. The dramatic scenic beauty of the varied mountain landscape is complemented by numerous small mountain lakes, pools, rivers, creeks and precipitous canyons. Embedded into the landscape are numerous remarkable archaeological sites, serving as a reminder of the still poorly-understood life of bygone societies in a stunning natural environment.

Criterion (ix): The entire tropical Andes, extending across several countries, are known for their global conservation importance, tragically coinciding with increasingly strong human pressure. Within the region, Rio Abiseo National Park stands out as a mostly intact protected area benefitting from a high degree of isolation and natural protection by the harsh terrain. Along the huge altitudinal gradient from around 350 to 4,349 m.a.s.l. and influenced by highly variable soils, expositions, rainfall patterns and microclimates the property is home to extremely varied ecosystems and habitats. Broadly speaking, dry forests can be distinguished from four types of moist forests and the high altitude grasslands. Rio Abiseo´s pristine clouds forests reaching up to 3,600 m.a.s.l. stand out as a rare intact example of a particularly valuable forest type. The property is believed to belong to the Huallaga Pleistocene refugium according to the Pleistocene refuge hypothesis, a prevailing explanation for biodiversity patterns and endemism. Isolated refuges, such as the area today constituting the property, are thought to have enabled not only the survival but also the birth of new species during glacial periods. Still very incomplete records show impressive endemism in plants, invertebrates, amphibians, evidence for ongoing speciation processes. Beyond the scientifically fascinating degree of endemism, Rio Abiseo National Park is also an important reference for the study of pollen and climate change in the Amazon Basin.

Criterion (x): The numerous intact ecosystems and habitats harbour an impressive species diversity of global significance for conservation and science. Even though only limited research has been conducted in these forests and grasslands, more than 5,000 plant species have been recorded, almost 1,000 in the grasslands alone. The inventory of the fauna is likewise incomplete, taxonomic studies routinely yield species previously unknown to science, including vertebrates, such as reptiles, amphibians and even small mammals. The more conspicuous mammal fauna includes Spectacled Bear, Giant Armadillo, North Andean Deer, Jaguar and several other cat species. Out of the at least five primate species, the critically endangered Yellow-tailed Woolly Monkey stands out, as its future seems intricately linked to the future of Rio Abiseo National Park. Hundreds of bird species and countless arthropods are distributed across the many habitats and ecological niches. Endemism is high across many taxonomic groups and many species of flora and fauna are rare, some threatened or even in danger of extinction.

Encyclopedia Record: Rio Abiseo National Park

The Rio Abiseo National Park is located in the San Martín department of Peru. UNESCO pronounced it as Natural and Cultural Heritage of Humanity in 1990. The park is home to many species of flora and fauna, as well as the location of over 30 pre-Columbian archaeological sites. Since 1986, the park has not been open to tourism due to the fragile nature of both the natural and archaeological environment.

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IUCN World Heritage Outlook

The 2025 Conservation Outlook on Rio Abiseo National Park reports the following assessment:

Source: International Union for Conservation of Nature (IUCN) · View assessment