Bird populations in the Amazon are declining without clear cause

Bird populations in the Amazon's Yasuní Biosphere Reserve have mysteriously dropped by half over 23 years, with climate change being a potential culprit.

Bernardo Araujo reports for Mongabay.


In short:

  • The number of birds in Ecuador's Yasuní Biosphere Reserve has halved, according to a recent study.
  • Researchers suspect climate change as the primary cause, despite the area being largely undisturbed by human activity.
  • Similar declines have been observed in other tropical regions, indicating a broader environmental issue.

Key quote:

“There’s something called the dawn chorus, which is typical in tropical forests where lots of birds sing just before dawn. And over the last 10 years, that has just been going quieter and quieter with very few birds singing in the morning.”

— John Blake, University of Florida professor

Why this matters:

This decline in bird populations, even in pristine habitats, is indicative of the far-reaching impacts of climate change, raising alarms about the future of biodiversity in tropical ecosystems. For more, read our series, Winged Warnings: What birds are telling us about our planet's health.

A man wearing a hard hat standing in front of solar panels

The consequences of Trump's war on climate in 7 charts

Seven snapshots reveal how climate rollbacks altered the trajectory of U.S. energy, environmental protection, and economic security.
China renewable energy, wind and solar energy concept. Chinese flag superimposed with wind turbines and solar panels
Credit: Anton_Medvedev/ Big Stock Photo ID: 431444246

Economic interests drive Chinese climate leadership amid U.S. retreat

As the United States retreats from climate policy, China signaled its rising intent to lead a transition away from fossil fuels and toward Chinese-made renewable energy technologies in remarks to world leaders on Tuesday.

Illustration depicting pumpjacks vs solar panels & wind turbines
Credit: MIRO3D/BigStock Photo ID: 147195269

Wind and solar overtook fossil fuels for EU power generation in 2025, report finds

Researchers say event described as ‘major tipping point’ for clean energy in era of destabilized politics.

Two cranes unloading coal from barge to hopper at a coal port
Credit: dayatrhw/BigStock Photo ID: 156685868

Southeast Asia's coal demand undermines progress on clean energy

Southeast Asia’s need for coal is growing faster than anywhere else in the world, undermining progress on cutting carbon emissions that contribute to global warming.
two EVs, side by side, being recharged at charging stations.
Credit: Diana Light/Unsplash+

Congress green-lighted billions for EV chargers. Four years later, only 2% is spent

President Donald Trump’s spending freeze added a speed bump to the slow rollout of a Biden program to build a nationwide network of EV chargers.
An old oil pump jack in a dry field
Credit: flippo/Big Stock Photo

“A fraudulent scheme”: New Mexico sues Texas oil companies for walking away from their leaking wells

New Mexico’s lawsuit accuses three Texas oil executives of pocketing revenue from oil and gas wells and offloading cleanup costs to the public. An investigation in 2024 by ProPublica and Capital & Main uncovered some of these business dealings.
Four smokestacks billowing pollution
Credit: Niccolo Bertoldi/Big Stock Photo

Half of fossil fuel carbon emissions in 2024 came from 32 companies

As fossil fuel-based carbon dioxide emissions continue to rise to record levels, a new analysis shows that a majority of these emissions can be traced back to a shrinking number of large corporate entities.

From our Newsroom
Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

One facility has emitted cancer-causing chemicals into waterways at levels up to 520% higher than legal limits.

Regulators are underestimating health impacts from air pollution: Study

Regulators are underestimating health impacts from air pollution: Study

"The reality is, we are not exposed to one chemical at a time.”

Pennsylvania governor Josh Shapiro speaks with the state flag and American flag behind him.

Two years into his term, has Gov. Shapiro kept his promises to regulate Pennsylvania’s fracking industry?

A new report assesses the administration’s progress and makes new recommendations

silhouette of people holding hands by a lake at sunset

An open letter from EPA staff to the American public

“We cannot stand by and allow this to happen. We need to hold this administration accountable.”

wildfire retardants being sprayed by plane

New evidence links heavy metal pollution with wildfire retardants

“The chemical black box” that blankets wildfire-impacted areas is increasingly under scrutiny.

Stay informed: sign up for The Daily Climate newsletter
Top news on climate impacts, solutions, politics, drivers. Delivered to your inbox week days.