RAINFOREST INFORMATION

A Place Out of Time: Tropical Rainforests and the Perils They Face - information on tropical forests, deforestation, and biodiversity

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BACKGROUND INFORMATION ON THE RAINFOREST

Rainforests are forest ecosystems characterized by high levels of rainfall, an enclosed canopy and high species diversity. While tropical rainforests are the best-known type of rainforest and the focus of this section of the web site, rainforests are actually found widely around the world, including temperate regions in Canada, the United States, and the former Soviet Union.

Tropical rainforests typically occur in the equatorial zone between the Tropic of Cancer and Tropic of Capricorn, latitudes that have warm temperatures and relatively constant year-round sunlight. Tropical rainforests merge into other types of forest depending on the altitude, latitude, and various soil, flooding, and climate conditions. These forest types form a mosaic of vegetation types which contribute to the incredible diversity of the tropics.

The bulk of the world's tropical rainforest occurs in the Amazon Basin in South America. The Congo Basin and Southeast Asia, respectively, have the second and third largest areas of tropical rainforest. Rainforests also exist on some the Caribbean islands, in Central America, in India, on scattered islands in the South Pacific, in Madagascar, in West and East Africa outside the Congo Basin, in Central America and Mexico, and in parts of South America outside the Amazon. Brazil has the largest extent of rainforest of any country on Earth.

Rainforests provide important ecological services, including storing hundreds of billions of tons of carbon, buffering against flood and drought, stabilizing soils, influencing rainfall patterns, and providing a home to wildlife and Indigenous people. Rainforests are also the source of many useful products upon which local communities depend.

While rainforests are critically important to humanity, they are rapidly being destroyed by human activities. The biggest cause of deforestation is conversion of forest land for agriculture. In the past subsistence agriculture was the primary driver of rainforest conversion, but today industrial agriculture — especially monoculture and livestock production — is the dominant driver of rainforest loss worldwide. Logging is the biggest cause of forest degradation and usually proceeds deforestation for agriculture.

Organization of this site

The rainforest section of Mongabay is divided into ten "chapters" (the original text for the site was a book, but has since been adapted for the web), with add-on content in the form of special focal sections (e.g. The Amazon, the Congo, REDD, New Guinea, Sulawesi, Forests in Brazil, etc), appendices, and other resources.

There is also a version of the site geared toward younger readers at kids.mongabay.com.

ABOUT THE RAINFOREST (SUMMARY)

RAINFOREST DISTRIBUTION AND CHARACTERISTICS

Each rainforest is unique, but there are certain features common to all tropical rainforests.

• Location: rainforests lie in the tropics.
• Rainfall: rainforests receive at least 80 inches (200 cm) of rain per year.
• Canopy: rainforests have a canopy, which is the layer of branches and leaves formed by closely spaced rainforest trees some 30 meters (100 feet) off the ground. A large proportion of the plants and animals in the rainforest live in the canopy.
• Biodiversity: rainforests have extraordinarily highs level of biological diversity or “biodiversity”. Scientists estimate that about half of Earth's terrestrial species live in rainforests.
• Ecosystem services: rainforests provide a critical ecosystem services at local, regional, and global scales, including producing oxygen (tropical forests are responsible for 25-30 percent of the world's oxygen turnover) and storing carbon (tropical forests store an estimated 229-247 billion tons of carbon) through photosynthesis; influencing precipitation patterns and weather; moderating flood and drought cycles; and facilitating nutrient cycling; among others.

The global distribution of tropical rainforests can be broken up into four biogeographical realms based roughly on four forested continental regions: the Afrotropical, the Australiasian, the Indomalayan/Asian, and the Neotropical. Just over half the world's rainforests lie in the Neotropical realm, roughly a quarter are in Africa, and a fifth in Asia.

These realms can be further divided into major tropical forest regions based on biodiversity hotspots, including:

1. Amazon: Includes parts of Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, Venezuela
2. Congo: Includes parts of Cameroon, Central African Republic, Democratic Republic of the Congo, Equatorial Guinea, Gabon, Republic of Congo
3. Australiasia: Includes parts of Australia, Indonesian half of New Guinea, Papua New Guinea
4. Sundaland: Includes parts of Brunei, Indonesia, Malaysia, Singapore
5. Indo-Burma: Includes parts of Bangladesh, Cambodia, China, India, Laos, Myanmar, Thailand, Vietnam
6. Mesoamerica: Includes parts of Belize, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama
7. Wallacea: Sulawesi and the Maluku islands in Indonesia
8. West Africa: Includes parts of Benin, Cameroon, Côte d'Ivoire, Ghana, Guinea, Liberia, Nigeria, Sierra Leone, Togo
9. Atlantic forest: Includes parts of Argentina, Brazil, Paraguay
10. Choco: Includes parts of Colombia, Ecuador, Panama

Other countries that have large areas of rainforest include Bolivia, Cameroon, Central African Republic, Ecuador, Gabon, Guyana, India, Laos, Malaysia, Mexico, Myanmar, Papua New Guinea, Republic of Congo, Suriname, and Venezuela.

Cover and loss by rainforest region

RAINFOREST STRUCTURE

Rainforests are characterized by a unique vegetative structure consisting of several vertical layers including the overstory, canopy, understory, shrub layer, and ground level. The canopy refers to the dense ceiling of leaves and tree branches formed by closely spaced forest trees. The upper canopy is 100-130 feet above the forest floor, penetrated by scattered emergent trees, 130 feet or higher, that make up the level known as the overstory. Below the canopy ceiling are multiple leaf and branch levels known collectively as the understory. The lowest part of the understory, 5-20 feet (1.5-6 meters) above the floor, is known as the shrub layer, made up of shrubby plants and tree saplings.

RAINFOREST BIODIVERSITY

Tropical rainforests support the greatest diversity of living organisms on Earth. Although they cover less than 2 percent of Earth’s surface, rainforests house more than 50 percent of the plants and animals on the planet.

THE RAINFOREST CANOPY

In the rainforest most plant and animal life is not found on the forest floor, but in the leafy world known as the canopy. The canopy, which may be over 100 feet (30 m) above the ground, is made up of the overlapping branches and leaves of rainforest trees. Scientists estimate that more than half of life in the rainforest is found in the trees, making this the richest habitat for plant and animal life.

The conditions of the canopy are markedly different from the conditions of the forest floor. During the day, the canopy is drier and hotter than other parts of the forest, and the plants and animals that live there have adapted accordingly. For example, because the amount of leaves in the canopy can make it difficult to see more than a few feet, many canopy animals rely on loud calls or lyrical songs for communication. Gaps between trees mean that some canopy animals fly, glide, or jump to move about in the treetops. Meanwhile plants have evolved water-retention mechanisms like waxy leaves.

Scientists have long been interested in studying the canopy, but the height of trees made research difficult until recently. Today the canopy is commonly accessed using climbing gear, rope bridges, ladders, and towers. Researchers are even using model airplanes and quadcopters outfitted with special sensors — conservation drones — to study the canopy.

The rainforest floor

The rainforest floor is often dark and humid due to constant shade from the leaves of canopy trees. The canopy not only blocks out sunlight, but dampens wind and rain, and limits shrub growth.

Despite its constant shade, the ground floor of the rainforest is the site for important interactions and complex relationships. The forest floor is one of the principal sites of decomposition, a process paramount for the continuance of the forest as a whole. It provides support for trees responsible for the formation of the canopy and is also home to some of the rainforest's best-known species, including gorillas, tigers, tapirs, and elephants, among others.

Rainforest waters

Tropical rainforests support some of the largest rivers in the world, like the Amazon, Mekong, Negro, Orinoco, and Congo. These mega-rivers are fed by countless smaller tributaries, streams, and creeks. For example, the Amazon alone has some 1,100 tributaries, 17 of which are over 1,000 miles long. Although large tropical rivers are fairly uniform in appearance and water composition, their tributaries vary greatly.

Rainforest waters are home to a wealth of wildlife that is nearly as diverse as the biota on land. For example, more than 5,600 species of fish have been identified in the Amazon Basin alone.

But like rainforests, tropical ecosystems are also threatened. Dams, deforestation, channelization and dredging, pollution, mining, and overfishing are chief dangers.

Rainforest people

Tropical rainforests have long been home to tribal peoples who rely on their surroundings for food, shelter, and medicines. Today very few forest people live in traditional ways; most have been displaced by outside settlers, have been forced to give up their lifestyles by governments, or have chosen to adopt outside customs.

Of the remaining forest people, the Amazon supports the largest number of Indigenous people living in traditional ways, although these people, too, have been impacted by the modern world. Nonetheless, Indigenous peoples' knowledge of medicinal plants remains unmatched and they have a great understanding of the ecology of the Amazon rainforest.

In Africa there are native forest dwellers sometimes known as pygmies. The tallest of these people, also called the Mbuti, rarely exceed 5 feet in height. Their small size enables them to move about the forest more efficiently than taller people.

There are few forest peoples in Asia living in fully traditional ways. The last nomadic people in Borneo are thought to have settled in the late 2000's. New Guinea and the Andaman Islands are generally viewed as the last frontiers for forest people in Asia and the Pacific.

Deforestation

In recent decades there has been an important shift in deforestation trends. Today export-driven industries are driving a bigger share of deforestation than ever before, marking a shift from previous decades, when most tropical deforestation was the product of poor farmers trying to put food on the table for their families. There are important implications from this change. While companies have a greater capacity to chop down forests than small farmers, they are more sensitive to pressure from environmentalists. Thus in recent years, it has become easier—and more ethical—for green groups to go after corporations than after poor farmers.

Rainforests are also threatened by climate change, which is contributing to droughts in parts of the Amazon and Southeast Asia. Drought causes die-offs of trees and dries out leaf litter, increasing the risk of forest fires, which are often set by land developers, ranchers, plantation owners, and loggers.

Rainforest importance

While rainforests may seem like a distant concern, they are critically important for our well-being. Rainforests are often called the lungs of the planet for their role in absorbing carbon dioxide, a greenhouse gas, and producing oxygen, upon which all animals depend for survival. Rainforests also stabilize climate, house incredible amounts of plants and wildlife, and produce nourishing rainfall all around the planet.

Rainforests:

• Help stabilize the world’s climate: Rainforests help stabilize the world’s climate by absorbing carbon dioxide from the atmosphere. Scientists have shown that excess carbon dioxide in the atmosphere from human activities is contributing to climate change. Therefore, living rainforests have an important role in mitigating climate change, but when rainforests are chopped down and burned, the carbon stored in their wood and leaves is released into the atmosphere, contributing to climate change.
• Provide a home to many plants and animals: Rainforests are home to a large number of the world’s plant and animals species, including many endangered species. As forests are cut down, many species are doomed to extinction.
• Help maintain the water cycle: The role of rainforests in the water cycle is to add water to the atmosphere through the process of transpiration (in which plants release water from their leaves during photosynthesis). This moisture contributes to the formation of rain clouds, which release the water back onto the rainforest. In the Amazon, 50-80 percent of moisture remains in the ecosystem’s water cycle. When forests are cut down, less moisture goes into the atmosphere and rainfall declines, sometimes leading to drought. Rainforests also have a role in global weather patterns. For example researchers have shown that forests in South America affect rainfall in the United States, while forests in Southeast Asia influence rain patterns in southeastern Europe and China. Distant rainforests are therefore important to farmers everywhere.
• Protect against flood, drought, and erosion: Rainforests have been compared to natural sponges, moderating flood and drought cycles by slowing run-off and contributing moisture to the local atmosphere. Rainforests are also important in reducing soil erosion by anchoring the ground with their roots. When trees are cut down there is no longer anything to protect the ground, and soils are quickly washed away with rain. On steep hillsides, loss of forest can trigger landslides.
• Are a source for medicines and foods and support forest-dependent people: People have long used forests as a source of food, wood, medicine, and recreation. When forests are lost, they can no longer provide these resources. Instead people must find other places to get these goods and services. They also must find ways to pay for the things they once got for free from the forest.

Rainforest conservation

Rainforests are disappearing very quickly. The good news is there are a lot of people who want to save rainforests. The bad news is that saving rainforests will be a challenge as it means humanity will need to shift away from business-as-usual practices by developing new policies and economic measures to creative incentives for preserving forests as healthy and productive ecosystems.

Over the past decade there has been considerable progress on several conservation fronts. Policymakers and companies are increasingly valuing rainforests for the services they afford, setting aside large blocks of forests in protected areas and setting up new financial mechanisms that compensate communities, state and local governments, and countries for conserving forests. Meanwhile, forest-dependent people are gaining more management control over the forests they have long stewarded. Large international companies are finally establishing policies that exclude materials sourced via deforestation. People are abandoning rural areas, leading to forest recovery in some planes.

But the battle is far from over. Growing population and consumption means that rainforests will continue to face intense pressures. At the same time, climate change threatens to dramatically alter temperatures and precipitation patterns, potentially pushing some forests toward critical tipping points.

Thus the future of the world's rainforests in very much in our hands. The actions we take in the next 20 years will determine whether rainforests, as we currently know them, are around to sustain and nourish future generations of people and wildlife.

The Latest News on Rainforests

Indonesia braces for possible ‘Godzilla El Niño’ as fire season escalates early (Apr 15 2026)
- The 2026 fire season in Indonesia is already showing early signs of escalation, as burned areas reached 32,637 hectares by February, 20 times higher than the same period in 2025.
- Some global forecasts suggest this year’s predicted El Niño could become one of the strongest in at least a decade, raising the risk of prolonged drought and widespread fires, although significant uncertainty remains over how intense it will ultimately be.
- Fire monitoring by the watchdog Pantau Gambut show that many hotspots are in oil palm and timber concession areas, which the group says suggests that legal permits alone do not guarantee fire-safe land management and highlights gaps in oversight and enforcement.

Can nature outcompete war in Eastern Congo? (Apr 13 2026)
- In eastern Democratic Republic of the Congo, pressure on Virunga National Park reflects deeper economic and governance dynamics, where conservation competes with immediate livelihood needs tied to charcoal production and agriculture.
- Emmanuel de Merode frames environmental decline as a consequence of how people earn a living, arguing that protecting biodiversity requires addressing energy access, jobs, and local economic systems.
- Virunga has developed an integrated model built around renewable energy, small business development, financial access, and localized security, aimed at shifting incentives away from conflict-linked and extractive activities.
- The proposed Green Corridor extends this approach across a national scale, testing whether a viable economic system can be built that depends on maintaining forests rather than clearing them, despite ongoing conflict and political constraints.

Defying conflict to track the world’s rarest chimpanzees (Apr 13 2026)
GASHAKA GUMTI NATIONAL PARK, Nigeria — Here in Nigeria’s largest protected wilderness area lies one of the last strongholds of the Nigeria–Cameroon chimpanzee (Pan troglodytes ellioti), the world’s rarest chimpanzee subspecies. For nearly a decade, however, this population has lived largely out of sight. Once a leading hub for field research in West Africa, Gashaka […]

The mother of orangutans (Apr 11 2026)
Dr Birutė Galdikas spent almost 50 years studying solitary and elusive orangutans in Borneo, at a time when no one believed it possible. Her pioneering work transformed scientific understanding of the great apes and their behavior.  She passed on March 24 at the age of 79. Dr. Galdikas was one of three women who revolutionised […]

Venezuela’s new mining law could spell disaster for the Amazon, critics warn (Apr 10 2026)
- Venezuela passed a law to update the country’s mining regulations and attract international investment in gold, silver, coltan and other minerals.
- While some environmental protections are included in the bill, critics say they’re not rigorous enough to stop the deforestation or human rights abuses already happening in the Venezuelan Amazon.
- The law describes a commitment to “ecological mining development” that critics call a dangerous attempt at greenwashing.

Indigenous & community leaders say, ‘secure forest financing with us, not for us’ (commentary) (Apr 7 2026)
- With the expansion of government forest protection programs like REDD+ in recent years, Indigenous communities are increasingly asking if these initiatives boost their autonomy and benefits, or repeat old patterns of exclusion.
- These programs’ success will increasingly depend on the full participation of their peoples in the process that determines how benefits and revenues from these transactions are shared, three Indigenous and Afro-descendant leaders write in a new op-ed.
- “We believe the path forward is clear: climate policy must be built with communities, not for them,” they say.
- This article is a commentary. The views expressed are those of the authors, not necessarily of Mongabay.

A Congo Basin-led bioeconomy could boost Central Africa’s green transition (analysis) (Apr 6 2026)
- As the global economy shifts toward greener, more sustainable models, the Congo Basin has a unique opportunity to position itself within this landscape by building a resilient bioeconomy that prioritizes local value creation while preserving critical ecosystems.
- Despite its rich natural endowments, this region often faces a paradox: while conservation protects, extraction exploits, and agreements frequently stall.
- “Promoting innovative approaches to biodiversity value creation directly supports efforts to enhance innovation and competitiveness, while emphasizing the need for durable, inclusive systems that capture long-term value for local communities,” a new analysis argues.
- This article is an analysis. The views expressed are those of the author, not necessarily of Mongabay.

A unique clearing in Central Africa draws elephants from the dense forests (Apr 6 2026)
- Dzanga Bai is an exceptional forest clearing where hundreds of elusive forest elephants gather, offering scientists and visitors opportunities to observe their behavior, social interactions and family dynamics in the open.
- Mineral-rich soil and shallow pools draw elephants and other wildlife like bongos and forest buffalo, making the clearing a unique ecological hotspot and a valuable site for long-term research on a little-understood species.
- Dzanga Bai is a growing tourism spot for the Central African Republic, but growth remains limited by difficult access, infrastructure constraints and perceptions of insecurity.

An invasive guava is muscling out Madagascar’s forests — and lemurs are helping (Mar 31 2026)
- The island of Madagascar is a hotspot for animal and plant biodiversity, but since the 1950s it has suffered high rates of deforestation.
- Once damaged, these forests are susceptible to takeover by a nonnative plant invader, the strawberry guava tree originally from Brazil.
- The guavas produce delicious fruit that the lemurs relish and whose seeds the lemurs themselves help to spread.
- Conservationists say forest restoration, critical to the survival of lemurs, needs to take into account the pernicious effects that strawberry guavas have on the ecology of forests — both those that are still intact, and those that are being restored.

As traditional forest governance erodes in Peru, ‘ghost permits’ fill the vacuum (Mar 30 2026)
- In the Peruvian Amazon, prosecutors and documents show how “ghost paper forests” have allowed illegal logging to penetrate Indigenous governance, with forest permits rented or sold by community leaders and used to launder timber cut in unapproved or protected areas, turning legal paperwork into a shadow supply chain.
- Around Peru’s Boiling River, deforestation and land pressure tied to ecotourism and spiritual entrepreneurship are also reshaping who controls the forest, with mestizo healers warning that rituals, language use, elder authority and secure land tenure are being sidelined in favor of extractive, tourism-driven claims.
- Sources say the erosion of Indigenous governance of forests is one cause of these issues, transforming the forest as deeply as any external pressure, weakening language, ritual life and communal authority while allowing corruption to drive deforestation from within.
- In response, Peru’s modern forest system has increasingly turned to institutional reforms that aim to counter these pressures by formally involving Indigenous communities in forest governance, monitoring and decision-making.

Grasslands and wetlands are being lost to agriculture four times faster than forests (Mar 30 2026)
Wild ecosystems such as grassland savannas, bush and open wetlands are losing ground worldwide to make way for large pastures and grain fields. A new study found these ecosystems are being converted at a rate four times higher than for forests.   Over a 15-year period, from 2005-2020, researchers found that 190 million hectares (470 […]

Why the Amazon can’t be saved by courts alone (commentary) (Mar 26 2026)
- The Amazon cannot be saved by legal recognition alone. Declaring the forest a subject of rights is historic, but without real authority for Indigenous governments, these rights risk remaining largely symbolic.
- Protecting the forest requires shared governance: national ministries, regional agencies, and local governments must coordinate decisions with Indigenous authorities who already govern vast Amazonian territories — and protect the knowledge systems that have sustained it for generations.
- The limited implementation of the ruling recognizing the Amazon as a subject of rights reflects the gap between judicial decisions and realities on the ground, as well as the political and social complexity of the Amazon across territorial, national, regional, and international scales.
- This article is a commentary. The views expressed are those of the authors, not necessarily of Mongabay.

Palm oil clearing advances in Bornean orangutan habitat despite red flags (Mar 26 2026)
- A palm oil firm has cleared more than 3,000 hectares (7,500 acres) of forest inside a UNESCO biosphere reserve in Indonesian Borneo, threatening areas identified as orangutan habitat.
- The concession overlaps with a wildlife corridor linking two national parks, raising concerns over habitat fragmentation and increased human-orangutan conflict.
- Authorities have acknowledged the presence of the habitat inside the company’s concession, but proposed voluntary conservation measures rather than halting clearing, drawing criticism from environmental groups.
- The case highlights broader issues of weak enforcement, disputed land rights with Indigenous communities, and supply-chain loopholes that continue to allow deforestation-linked palm oil into global markets.

Behind the scenes of the Amazon’s gold rush: Director Richard Ladkani on the making of ‘Yanuni’ (Mar 25 2026)
- A new documentary film, “Yanuni,” highlights the journey of Juma Xipaia, an Indigenous chief from the Brazilian Amazon, as she moves between two worlds: Brazil’s capital, Brasília, and a remote village in the Xipaia Indigenous Territory.
- The film focuses on her ongoing battle to protect the Amazon, alongside her husband, Hugo Loss, the head of Special Operations at Brazil’s environmental protection agency (Ibama), who leads dangerous operations to crack down on illegal mining deep in the Amazon.
- In an interview with Mongabay, director Richard Ladkani shares behind-the-scenes insights into the filming process, important conversations and actions that helped shape the narrative and more details about some of the critical moments and events it covers.

An ‘ethereal’ new-to-science poison dart frog from the Amazon: Photo of the week (Mar 19 2026)
Scientists in Brazil described a new-to-science species of poison dart frog last year. It was first found among the leaves of wild banana plants on a research expedition to the Juruá River Basin in the western Amazon in 2023. The frog, around the length of a paperclip (14–17 millimeters, or 0.5-0.7 inches), is reddish-brown and blue […]