Hosting the World, Burning the Pantanal: Brazil's Environmental Credibility on Trial

Brazil invited the world to discuss migratory species protection. The world arrived to find the host country's own migration corridors under pressure from agriculture, fire, and infrastructure expansion. For Brazilian readers, this is not a foreign policy story. It is a story about the cerrado outside the window and the Pantanal across the state border.

What Happened at CMS COP15

From March 23 to 29, 2026, Brazil is hosting the 15th Conference of the Parties to the Convention on the Conservation of Migratory Species at the Bosque Expo in Campo Grande, Mato Grosso do Sul, at the gates of the Pantanal. The conference brings delegates from more than 130 countries to discuss the protection of animals that cross international borders.

Brazil joined the CMS in October 2015. The country's territory supports an estimated 20 percent of global biodiversity, including migratory birds, river dolphins, sea turtles, sharks, and freshwater fish that move seasonally across vast distances.

The Brazilian delegation, led by the Ministry of Environment under Marina Silva, presented a dual message: significant reductions in Amazon deforestation under the Lula government, and new national commitments to migratory species corridor protection.

The conference generated resolutions on shark conservation, light pollution impacts on sea turtles, and ecological connectivity. Brazil co-sponsored several of these. The practical question is what changes on the ground.

The Cerrado Nobody Talks About

International media coverage of Brazilian deforestation focuses overwhelmingly on the Amazon. For migratory species, the cerrado is equally critical and far less protected.

The cerrado covers approximately 2 million square kilometers across central Brazil, spanning parts of Goiás, Minas Gerais, Bahia, Mato Grosso, Mato Grosso do Sul, Tocantins, and other states. It is the world's most biodiverse tropical savanna. Only about 8 percent of the cerrado falls within conservation units, with just 3 percent under strict protection, compared to roughly 46 percent of the Amazon under various protection categories including indigenous territories.

INPE PRODES data shows that cerrado deforestation in the 2022-2023 monitoring period reached approximately 11,022 square kilometers, the highest since 2015. Soy, cotton, and cattle operations drive this expansion. Seventy-five percent of this deforestation was concentrated in the MATOPIBA region, covering parts of Maranhão, Tocantins, Piauí, and Bahia, the new agricultural frontier where native cerrado vegetation is being converted at an accelerating pace. By the 2024-2025 period, cerrado deforestation declined to 7,235 square kilometers, an 11.5 percent reduction.

For migratory species, this matters directly. Nearctic-Neotropical migratory birds, species that breed in North America and winter in South America, depend on intact cerrado grasslands and wetlands. The upland sandpiper (maçarico-do-campo) and the bobolink (triste-pia) are among dozens of species that use the cerrado during the Southern Hemisphere summer months. When cerrado grassland becomes soy monoculture, these species lose habitat they have used for thousands of years.

MapBiomas data shows that cerrado land conversion continued through 2024 and into 2025, with agriculture expanding into previously intact areas across the MATOPIBA frontier. The Brazilian Agricultural Research Corporation (Embrapa) projects further agricultural expansion into the cerrado based on global commodity demand.

The Pantanal on Fire

The Pantanal, shared between Mato Grosso and Mato Grosso do Sul, is the world's largest tropical wetland at an estimated 140,000 to 195,000 square kilometers. Its seasonal flood cycle creates one of the most important migratory waterbird habitats in the Americas.

In 2024, the Pantanal experienced its worst fire season in recent history. INPE's fire monitoring program recorded more than 1.3 million hectares burned through August 2024, with June alone seeing approximately 440,000 hectares destroyed, a record for that month. Drought conditions linked to the El Niño weather pattern and longer-term climate trends reduced water levels to record lows, transforming wetland vegetation into fuel.

The fires affected breeding and feeding habitat for the jabiru stork (tuiuiú), the symbol of the Pantanal and a species that depends on standing water for nesting. Wood storks, roseate spoonbills, and numerous heron species also lost nesting sites.

The hyacinth macaw (arara-azul), which depends on specific palm tree species for nesting and feeding, lost habitat in the northern Pantanal. While not a long-distance migrant, the species undertakes seasonal movements within the biome that fire disrupts.

Ranchers in the Pantanal use fire for pasture management. When drought conditions coincide with these practices, fires escape into natural vegetation. The enforcement capacity to regulate burning practices remains limited. IBAMA operates with approximately 700 active field inspectors for the entire national territory of 8.5 million square kilometers.

The Amazon River Dolphin and Blocked Rivers

The boto (Amazon river dolphin) and the tucuxi (Sotalia fluviatilis) undertake seasonal movements tied to the Amazon's flood cycle. During high water, they move into flooded forests. During low water, they concentrate in river channels.

In late 2023, a severe drought in the Amazon killed more than 200 dolphins, both botos and tucuxis, in and around Lago Tefé, Amazonas state, when water temperatures exceeded 39 degrees Celsius with peaks reaching 41 degrees. The mass mortality event drew global attention to the boto, classified as endangered by the IUCN since 2018.

Hydroelectric dams on Amazon tributaries permanently alter these movement patterns. The Belo Monte dam on the Xingu River, completed in November 2019 with an installed capacity of 11,233 MW, changed flow patterns in the Volta Grande do Xingu, a stretch of river critical for migratory fish species. The jaraqui, tambaqui, and other fish that migrate hundreds of kilometers along Amazonian rivers to spawn found their routes blocked or altered.

For riverside communities that depend on migratory fish for protein and income, this is an immediate livelihood issue. Fishermen in the Volta Grande do Xingu have reported declining catches since Belo Monte began full operation.

BR-319 and Ferrogrão: The Roads That Cut Through

Two infrastructure projects illustrate the collision between development and ecological connectivity.

The BR-319 highway connects Manaus to Porto Velho across approximately 870 kilometers of largely intact Amazon rainforest. Originally built in the 1970s, the road deteriorated and became largely impassable. Reconstruction would connect the deforestation arc of southern Amazonia to the still-intact central Amazon.

Research from the Federal University of Minas Gerais indicates that paving BR-319 would cause a fourfold increase in deforestation rates in the surrounding area. Satellite monitoring has already documented 132,000 hectares of tree loss around the road. The road would cut through habitat used by migratory birds, jaguars moving between population clusters, and countless other species.

DNIT obtained a preliminary environmental license in July 2022 during the Bolsonaro administration. IBAMA's technical staff have repeatedly questioned the adequacy of the environmental impact study, and the license was subsequently challenged in court. The reconstruction remains a priority for the federal government under the argument of connecting isolated populations in Manaus.

The Ferrogrão railway, a proposed 933-kilometer grain transport corridor from Sinop (Mato Grosso) to the port of Miritituba (Pará), would create a more efficient route for soy exports. The project runs parallel to the BR-163 highway through the Amazon-cerrado transition zone, cutting through the Jamanxim National Forest. The Supreme Federal Tribunal has been deliberating on the project's constitutionality, with proceedings suspended since October 2025. Legislative efforts to advance the project continued through 2025, driven by the agribusiness lobby, with an auction scheduled for September 2026.

For residents of Mato Grosso and Pará, these projects represent jobs and economic integration. For the ecosystems they cross, they represent fragmentation. The tension is real on both sides.

Marina Silva Between Congress and the Forest

Marina Silva's return as Environment Minister in January 2023 generated expectations among conservationists. Her track record shows genuine progress constrained by political reality.

Silva rebuilt enforcement capacity that had been systematically dismantled under Bolsonaro. IBAMA operations increased. Amazon deforestation declined by approximately 50 percent from the 2022 peak by 2025, according to PRODES data. The Amazon Fund, frozen under Bolsonaro, was reactivated with contributions from Norway, Germany, and other donors.

The constraints are structural. The agricultural caucus (bancada ruralista) controls a large bloc in Congress. In 2023, Congress advanced legislation reducing protections for certain conservation areas and restricting Indigenous territory demarcation. President Lula, balancing his coalition, did not veto all of these measures.

Silva's ministry budget, while improved from the Bolsonaro era, remains modest given the enforcement challenge. IBAMA had approximately 700 active field inspectors as of 2024, down from roughly 1,800 in 2009. Recruitment efforts brought the number to approximately 771 by mid-2025, still far below what monitoring 8.5 million square kilometers of territory requires.

Her hosting of CMS COP15 in Campo Grande gave international visibility to Brazilian conservation challenges and to her own ministry's work. Whether this translates into stronger domestic policy tools depends on political dynamics that are beyond the ministry's control.

This suggests that the environmental gains of the Lula era, real as they are, remain reversible. They depend on one minister's position within a coalition where agricultural interests hold structural power.

What This Means

Brazil's CMS COP15 commitments include a national action plan for migratory species in the Amazon basin. At the time of writing, the details, funding sources, timelines, and measurable targets of this plan have not been published.

The test is specific and observable. If BR-319 proceeds without meaningful ecological connectivity provisions, if cerrado deforestation continues without systemic policy change while the country pledges corridor protection at international conferences, if the Pantanal burn cycle continues without effective management, the gap between diplomatic commitment and environmental reality will widen.

For Brazilian readers, this is not abstract. The tuiuiú nesting in the Pantanal, the maçarico-do-campo arriving in the cerrado for the austral summer, the boto moving through flooded forests: these are species whose continued presence depends on whether policy decisions made in Brasília and in state capitals reflect what Brazil promised the world.

The data does not show bad faith. It shows a structural imbalance between the pressures on Brazilian biomes and the instruments deployed to protect them. The CMS COP15 commitments are a benchmark. Whether Brazil meets them is now measurable.