National Park of American Samoa ⓘ

Nestled in the heart of the South Pacific, the National Park of American Samoa offers an unparalleled experience of natural beauty, cultural richness, and ecological diversity. Spread across the islands of Tutuila, Ofu, and Ta‘ū, this park is a living testament to the harmonious coexistence of nature and the Samoan way of life. Established in 1993, the park covers over 8,000 acres of lush rainforests, rugged mountains, and vibrant coral reefs, preserving these ecosystems for the enjoyment and education of future generations.

The National Park of American Samoa is home to the only paleotropical rainforest ecosystem within the U.S. national park system. These forests are composed of species originating from the ancient ecosystems of Southeast Asia. The rainforest is a stunning mosaic of biodiversity, with over 475 plant species and 50 animal species, including two species of native fruit bats. These bats, known locally as pe‘a , are vital for pollination and seed dispersal, helping to maintain the health of the ecosystem.

The park’s rainforests cover the landscape from the shorelines to the mountain peaks, creating a sanctuary for countless endemic and native species. The intact forest ecosystems provide critical habitat and are culturally significant, being used for traditional Samoan practices, medicines, and ceremonies.

The park contains some of the most pristine and ecologically diverse coral reefs in the world. It is the only U.S. national park with an Indo-Pacific coral reef ecosystem. These reefs are teeming with life, sheltering more than 230 species of coral and over 900 species of fish. The coral reefs are particularly resilient, with certain areas like the Ofu Lagoon showing resistance to rising ocean temperatures, making them a crucial area for scientific research on the effects of climate change.

These underwater ecosystems are not just ecologically significant—they also have deep cultural value to the Samoan people, who rely on the ocean for sustenance and spiritual connections.

Samoan culture is Polynesia’s oldest. The first people of the Samoan Islands are believed to have arrived by sea from southwest Asia around 3,000 years ago. Over the centuries, distinct cultural traits emerged that are now known as fa’asamoa (fah-ah-SAH-mo-ah), which forms the foundation of Samoan identity and daily life. From Samoa, seafaring explorers and settlers journeyed across the vast Pacific, reaching other Polynesian island groups hundreds of miles away.

The National Park of American Samoa preserves this ancient cultural heritage and ensures that fa’asamoa , or the Samoan way of life, continues to thrive. Unlike most national parks, where the land is federally owned, the National Park of American Samoa is unique in that the land is leased from local villages. This collaborative arrangement reflects the respect for traditional Samoan land tenure, where land is owned and managed communally under the guidance of village chiefs, or matai .

The park works closely with these local communities to ensure that the preservation of natural resources aligns with the continuation of traditional subsistence practices, such as fishing, gathering, and farming. Visitors can see firsthand how the Samoan people have lived sustainably in harmony with their environment for thousands of years, and how these practices continue to shape daily life.

American Samoa has been inhabited for over 3,000 years, making it one of the oldest human settlements in Polynesia. The park protects important cultural and archeological sites, including ancient village locations, star mounds, and stone tool production areas. The sacred site of Saua on Ta‘ū Island is considered by many Samoans to be the birthplace of Polynesian culture, where the ancestors of modern Samoans first settled.

These cultural resources offer a unique opportunity to understand the history of the Polynesian people and their extraordinary navigational skills, which allowed them to explore and settle vast expanses of the Pacific Ocean. The park’s preservation of these historical sites ensures that future generations can learn about and appreciate the deep cultural heritage of the Samoan people.

The National Park of American Samoa serves as a living laboratory for scientific research, offering unique opportunities to study rainforest and marine ecosystems. Scientists from around the world visit the park to conduct research on a range of topics, from biodiversity and species conservation to climate change resilience. The park’s coral reefs, in particular, are a focus of global attention due to their apparent resistance to rising ocean temperatures and changes in pH levels, which could provide key insights into the future health of coral reefs worldwide.

In addition to scientific research, the park plays a critical role in conservation efforts. It protects species that are under threat from habitat loss, invasive species, and climate change, ensuring that these ecosystems remain intact for future generations.

The breathtaking beauty of the National Park of American Samoa is another key feature that sets it apart. Visitors can experience a dramatic landscape of rugged sea cliffs, verdant rainforests, and white sandy beaches, all set against the backdrop of the vast Pacific Ocean. The islands are the peaks of ancient underwater volcanoes, with landscapes that tell the story of their formation over millions of years.

The remoteness of the park adds to its allure, offering a sense of tranquility and isolation rarely found in other national parks. Whether hiking to the summit of Mt. Lata on Ta‘ū, the highest point in American Samoa, or exploring the untouched beaches of Ofu Island, the park provides a unique opportunity to experience wilderness in its most pristine form.

The National Park of American Samoa is a place of extraordinary natural beauty and biodiversity. Situated in one of the most remote regions of the world, this park offers a unique opportunity to explore both tropical rainforests and marine ecosystems that are teeming with life.

The park's volcanic islands—Tutuila, Ta'ū, and Ofu—are predominantly covered in tropical rainforest, creating a lush green environment that stretches from mountaintops down to the coastlines. These rainforests are home to numerous endemic plant and animal species, including the famed Samoan fruit bat (flying fox). The towering banyan trees, ferns, and dense understory create a vibrant ecosystem that supports the region’s diverse wildlife, including native birds, insects, and plants .

The marine environment surrounding the islands is just as impressive. The park protects nearly 4,000 acres of ocean, including coral reefs that fringe the islands of Tutuila, Ofu, and Ta'ū. These reefs are home to over 900 species of fish, more than 230 species of coral, and a number of endangered species such as the green and hawksbill sea turtles .

While the reefs provide a colorful display of marine life, the waters of American Samoa are also frequented by migrating humpback whales during the austral winter. The rich biodiversity of the reefs and open ocean creates a thriving ecosystem that is integral to the health of the region .

Despite the rich biodiversity, the park's ecosystems face challenges from climate change, overfishing, and invasive species. Coral bleaching events, severe storms, and invasive species such as the crown-of-thorns starfish pose ongoing threats to the health of the coral reefs . The park is actively engaged in conservation efforts, working closely with local villages to protect these natural resources through sustainable practices .

Visitors to the National Park of American Samoa have the chance to experience one of the most ecologically diverse environments in the world. From the vibrant coral reefs to the misty mountain rainforests, the park offers a variety of ways to connect with nature. Whether you are snorkeling among the fish or hiking the rainforest trails, you will be immersed in a landscape shaped by millions of years of natural history.

At first glance, Samoa may not seem particularly rich in bird life. There are no gulls following ships or gathering at the harbor, and in town, the birds are mostly recent introductions from Asia, such as bulbuls and mynas . However, a closer look reveals a surprisingly diverse and vibrant avian population.

Samoa’s skies and shores host a variety of sea birds , including terns , boobies , frigatebirds , petrels , and shearwaters , which come to the islands to breed. Migratory shorebirds , such as the bristle-thighed curlew from Alaska, spend the winter here during Samoa's summer. The islands also boast a nearly intact native rainforest that provides a home for a range of resident forest birds.

Among the forest species, you'll find honeyeaters and tropical doves and pigeons . Noteworthy species include the striking cardinal honeyeater and wattled honeyeater , both of which are easily seen, as well as the endemic Samoan starling . More elusive, and often wary due to their popularity as local delicacies, are the Pacific pigeon , ground dove , and two species of fruit dove .

With its variety of species, careful observers will find that Samoa is indeed rich in bird life, from seabirds and migrants to native forest dwellers.

The plant communities of the park, stretching from the mountaintops to the ocean, are predominantly tropical rainforests. These rainforests represent the climax vegetation of the equatorial climate, meaning they are the mature and stable form of vegetation in this environment. Unlike the temperate forests of North America, which are often dominated by just one or a few tree species, tropical rainforests are marked by their incredibly high species diversity, with many species co-dominating the ecosystem.

Because Samoa is a young oceanic island with no historical land connection to continental land masses, the native plant species arrived by chance dispersal. As a result, the species diversity in Samoa is less than in regions like Southeast Asia, which is the primary source of many plant dispersals to the island. However, the rainforest here remains incredibly important for maintaining the island’s delicate balance of life.

Tropical rainforests are critical for maintaining biodiversity, climate regulation, and supporting local wildlife. The dense canopy of trees provides essential habitat for a variety of species, including birds, mammals, and insects. These forests also play a crucial role in the island's water cycle, capturing rainfall, preventing soil erosion, and maintaining the flow of clean water to streams and rivers.

Rainforests act as natural barriers, protecting the land from the effects of heavy rainfall, such as landslides and flooding. Their dense root systems help stabilize the soil, reducing the likelihood of erosion. Additionally, tropical rainforests serve as carbon sinks, helping to mitigate the effects of global climate change by absorbing carbon dioxide from the atmosphere.

The rainforest in American Samoa is home to a range of unique plant and animal species. The flora includes towering trees like the native Pometia ( Tava ), as well as ferns, vines, and epiphytes that thrive in the humid, warm environment. Some plants, such as the native pandanus and Falealupo trees, are important both ecologically and culturally, providing materials for traditional Samoan crafts and construction.

The fauna of the rainforest is equally diverse. The park is home to native birds such as the Samoan Starling and the rare Tooth-billed Pigeon ( Manumea ), which can only be found in Samoa. Many of these species rely on the rainforest for shelter and food, and the loss of this habitat could threaten their survival.

Despite its resilience, the tropical rainforest faces significant threats. Invasive species , such as the Tamaligi and Lopa trees, outcompete native species for resources, altering the ecosystem’s balance. Once these invasive plants establish themselves, they form dense thickets that crowd out native vegetation and reduce biodiversity. Additionally, the impacts of climate change , including rising temperatures and shifting weather patterns, are placing additional stress on the rainforest, particularly its coral reef systems, which are vital to the island's marine biodiversity.

Human activity is another challenge. With the growing population on the island, pressure on the land is increasing. Subsistence farming, land clearing for agriculture, and development all contribute to habitat loss and fragmentation, further threatening the rainforest's ability to thrive.

The animal life of the National Park of American Samoa is unlike that of any other U.S. National Park. From the flying foxes (fruit bats) that soar over the mountains to the expansive coral reefs along the shorelines, these key animal forms play a central role in shaping the park’s diverse ecosystems.

Flying foxes , vital terrestrial pollinators, are especially important to the park's rainforests. As a result, the forest here is dominated by fruit-bearing species , in contrast to Hawaii, where nectar-seeking birds and insects primarily pollinate native forests. These fruit bats sustain the health of the rainforest, contributing to the park’s vibrant plant life.

Along the coast, the park’s coral reefs boast the greatest marine biodiversity of any U.S. National Park or territory. The park is home to more than 800 native fish species and 200 coral species , making the underwater world both bewildering and awe-inspiring.

For more information, the park's Natural History Guide provides a checklist of mammals. You can also view detailed lists of the park’s marine mammals and reptiles to explore even more of its incredible biodiversity.