World Heritage Identification Number: 548
World Heritage since: 1990
Category: Mixed Cultural Heritage and Natural Heritage
WHE Type: Protected Areas & National Parks
Transboundary Heritage: No
Endangered Heritage: No
Country: 🇵🇪 Peru
Continent: Americas
UNESCO World Region: Latin America and the Caribbean
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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.
More to come…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.Additional Site Details
Area: 272,408 hectares
Number of Components: 1
(vii) — Contains superlative natural phenomena or beauty
(ix) — Outstanding example representing ecological and biological processes
(x) — Contains most important habitats for biodiversity
Coordinates: -7.75 , -77.25
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
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© Ti galan, CC BY-SA 4.0 Resized from original. (This derivative is under the same CC BY-SA license.)
World Heritage Research
Discover scientific research and academic studies that deepen our understanding of Río Abiseo National Park from its history and significance to its conservation, management, and contemporary challenges.
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Biogeography and climate change threats of supersect. Tacsonia (subgenus Passiflora), in Peru
Climate change threatens to reduce the suitable habitat for Tacsonia species, part of the Passiflora genus, by 20%–60% by 2100, according to a biogeographical study in Peru. The research integrated distribution patterns, endemism, protection coverage, and ecological niche modeling to assess vulnerability. Most occurrences were found between 3,000 and 3,500 meters elevation, with Cusco and Cajamarca regions hosting the highest richness. Thirteen species are endemic, including five restricted to specific regions. The study also identified critical habitats within protected areas like Río Abiseo National Park, while projecting significant habitat loss under future climate scenarios.
Caicedo Baltodano, M. A., & Ocampo Pérez, J. (2026). Biogeography and climate change threats of supersect. Tacsonia (subgenus Passiflora), in Peru. Scientia Agropecuaria, 17(2), 379–407. https://doi.org/10.17268/sci.agropecu.2026.028
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A New Species of Marmosa (Mammalia: Didelphimorphia: Didelphidae) from Parque Nacional del Río Abiseo, Peru
Researchers have identified a new species of didelphid marsupial, Marmosa chachapoya, within the subgenus Stegomarmosa, from Río Abiseo National Park, Peru. This discovery, based on mitochondrial and nuclear DNA analysis alongside unique morphological traits, highlights the park's remarkable mammalian diversity. The new species is distinguished by its gray-based buffy-reddish ventral fur, narrow rostrum with an elongated premaxillary process, absence of postorbital processes, and diastemata among specific teeth. This finding underscores the importance of protected areas like Río Abiseo in conserving biodiversity.
Pavan, S. E., Abreu, E. F., Sánchez-Vendizú, P. Y., & Voss, R. S. (2025). A New Species of Marmosa (Mammalia: Didelphimorphia: Didelphidae) from Parque Nacional del Río Abiseo, Peru. American Museum Novitates, 2025(4037), 1–20. https://doi.org/10.1206/4037.1
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A hint on the unknown diversity of eastern Andes: high endemicity and new species of mammals revealed through DNA barcoding
A recent DNA barcoding study of Parque Nacional del Río Abiseo (PNRA) in Peru's eastern Andes reveals unprecedented mammal diversity, with 23 non-volant small mammal species identified—16 during a single 15-day sampling expedition. Strikingly, only four of these species matched known taxa, suggesting that at least 12 may represent new or undescribed species. The study highlights PNRA as a hotspot for endemism and beta diversity, with 69% of recorded species (11 out of 16) previously unknown from other sites. Phylogenetic analyses indicate diverse phylogeographic affinities, though limited comparative data hinder deeper historical reconstructions. This research underscores the region's untapped biodiversity and the urgent need for taxonomic attention to address significant sampling biases in Andean studies.
Pavan, S. E., Abreu, E. F., Sánchez-Vendizú, P. Y., Batista, R., Murta-Fonseca, R. A., Pradel, R., Rengifo, E. M., Leo, M., Pacheco, V., Aleixo, A., Percequillo, A. R., & Peloso, P. (2024). A hint on the unknown diversity of eastern Andes: high endemicity and new species of mammals revealed through DNA barcoding. Systematics and Biodiversity, 22(1). https://doi.org/10.1080/14772000.2024.2302196
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Patrones de fragmentación en las zonas de amortiguamiento de las Áreas Naturales Protegidas en la región San Martín, Perú
A recent study reveals that buffer zones of protected areas in the Peruvian Amazon, including Río Abiseo National Park, are experiencing moderate forest fragmentation. Researchers quantified land cover and forest loss between 2017 and 2021, finding significant deforestation rates in three sites—Río Abiseo (-0.71%), Cordillera Azul (-1.30%), and Alto Mayo (-1.87%)—while Pacaya Samiria remained stable. The analysis used spatial data from Esri Land Cover and Geobosque to assess fragmentation metrics, highlighting the vulnerability of these critical conservation areas to habitat loss.
Chávez, G., & Puerta, R. (2024). Patrones de fragmentación en las zonas de amortiguamiento de las Áreas Naturales Protegidas en la región San Martín, Perú. The Biologist, 22(2), 253–263. https://doi.org/10.62430/rtb20242221864
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List of bats register at high altitudes in Río Abiseo National Park
Researchers have documented 16 bat species at unusually high altitudes within Río Abiseo National Park, exceeding previously reported altitudinal ranges for four of them. This finding challenges assumptions about the distribution limits of bats, which typically avoid elevations above 2000 meters. The study, conducted through four expeditions between 1987 and 1990, collected data on species from the Phyllostomidae and Vespertilionidae families, providing a critical baseline for comparison with other high-altitude bat populations globally.
Romo, M., & Leo, M. (2023). List of bats register at high altitudes in Río Abiseo National Park. Revista Peruana de Biología, 30(4), e25047. https://doi.org/10.15381/rpb.v30i4.25047
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Aportes al conocimiento del armadillo peludo de nariz larga (Dasypus pilosus)
Research on the hairy long-nosed armadillo (Dasypus pilosus) reveals it as an opportunistic insectivore, primarily consuming underground larvae and colony-forming insects, with a preference for hymenopterans, lepidopterans, and coleopterans. This species, endemic to Peru's montane forests, was documented in Río Abiseo National Park during a wildlife inventory, where eight specimens were collected. Stomach content analysis provided insights into its dietary habits, while a review of previous records suggests it may also inhabit grasslands near forest edges and in the jalca region. The study indicates that D. pilosus is present in conservation areas across San Martin, Amazonas, and Cajamarca, emphasizing the need for further research to inform effective conservation strategies.
Leo, M. (2023). Aportes al conocimiento del armadillo peludo de nariz larga (Dasypus pilosus). Xenarthra, (24). https://doi.org/10.2305/mjny8822
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Gestión de los incendios forestales en el Páramo y las Yungas de la Reserva de Biosfera Gran Pajatén: prevención, respuestas y aprendizajes.
In the Reserva de Biosfera Gran Pajatén, a UNESCO-recognized site spanning nearly 25,097 km² across three Peruvian departments, integrated fire management strategies have been developed to protect the delicate ecosystems of the Páramo and Yungas. The Bosque Modelo Río Huayabamba - Abiseo (BMRHA), established in 2015, combines conservation efforts across multiple concessions and the Río Abiseo National Park, serving as a model for sustainable fire prevention and response in Sudamérica. This initiative highlights the importance of collaborative management in preserving mixed natural and cultural heritage sites, offering lessons for global biodiversity conservation.
Ubeda Olivas, M. F., Rojas Erazo, I. O., Vecco Giove, C. D., & Pecho Quispe, J. O. (2022). Gestión de los incendios forestales en el Páramo y las Yungas de la Reserva de Biosfera Gran Pajatén: prevención, respuestas y aprendizajes. https://doi.org/10.51252/4512
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