As wildfires grow more frequent and intense across the American West and beyond, a new scientific discipline is taking shape to answer a question that has received surprisingly little attention: what happens to wild animals when the air fills with smoke? Researchers are now probing how the haze that blankets forests, grasslands, and backyards affects the creatures that live there — and whether anything can be done to shield them from the worst effects.
The emerging field, sometimes called "smoke ecology," sits at the intersection of wildlife biology, atmospheric science, and public health. While the dangers of wildfire smoke to humans are well documented, its consequences for birds, mammals, and other wildlife remain poorly understood. Scientists say that gap in knowledge is becoming more urgent as smoke events intensify and stretch across ever-larger swaths of the continent.
One of the researchers leading this effort is Olivia Sanderfoot, a scientist at Cornell University. On a recent day, she stood on a flower-dotted hillside in Amherst, in Western Massachusetts, pausing to listen as a wave of birdsong washed over the landscape. An Eastern Wood-Pewee called. A goldfinch chimed in. A downy woodpecker added its signature rhythm.
"It's just magical," she said, with a tone of reverence. Around her, birds foraged among the wildflowers, while fluffy fledglings darted about, learning how to navigate the world. For Sanderfoot, such moments are not just pleasant interludes — they are reminders of what stands to be lost, and of how much remains unknown about the toll smoke takes on these creatures.
Her work focuses on how the smoke billowing off wildfires bothers birds specifically, and on what steps might prevent that harm. The research is part of a broader push by scientists to understand how smoke perturbs wild places and the animals that depend on them, and to identify interventions that could blunt its most damaging consequences.
Wildfire smoke is not a simple substance. It is a complex mixture of gases and fine particles produced by burning vegetation, and it can travel hundreds or even thousands of miles from its source. When it settles over a landscape, it alters the air animals breathe, the light available to plants, and the chemical signals that many species rely on to communicate, forage, and avoid predators.
For birds, those changes could be particularly consequential. Birds have highly efficient respiratory systems designed for the intense demands of flight, which may make them especially vulnerable to airborne particulates. Smoke could also disrupt their ability to find food, navigate during migration, or recognize the alarm calls and mating songs that hold their societies together.
Previous reporting has shown that wildfire smoke can be more harmful to humans than pollution from cars, underscoring just how potent this form of air pollution can be. If smoke poses such serious risks to people, scientistsreason, it is reasonable to expect that wildlife — with far less ability to retreat indoors or don protective masks — may face comparable or even greater dangers.
Yet the precise effects on animals are hard to pin down. Birds move constantly, they occupy vast and often remote landscapes, and their populations fluctuate for many overlapping reasons. Teasing apart the influence of smoke from the many other pressures they face — habitat loss, climate change, disease, and development — requires creative research methods and long-term monitoring.
That is where the new field of smoke ecology comes in. Researchers are developing ways to track how smoke exposure aligns with changes in bird behavior, health, and abundance. They are asking whether some species are more resilient than others, whether certain habitats offer refuge, and whether smoke's impacts linger long after the air clears.
The stakes extend beyond birds. Wildfire smoke perturbs entire ecosystems, affecting insects, mammals, amphibians, and the plants they depend on. Understanding those ripple effects is essential to predicting how wildlife communities will fare in a future shaped by bigger, hotter, and more frequent fires.
Sanderfoot's hillside in Amherst, with its chorus of wood-pewees, goldfinches, and woodpeckers, serves as a vivid counterpoint to the scorched landscapes where wildfires rage. It is a reminder that smoke does not stay where it starts. It drifts into farmlands, suburbs, and city parks, reaching animals that never evolved to cope with it.
The research also carries an implicit question about prevention and mitigation. If scientists can identify which species are most at risk, when they are most vulnerable, and where smoke exposure is most severe, that knowledge could inform conservation strategies — from protecting key habitats to timing land-management decisions around smoke forecasts.
For now, much of the work remains exploratory. Sanderfoot and her colleagues are still assembling the basic facts about how smoke affects wildlife, building a foundation that future studies and policy decisions can rest on. But the direction of travel is clear: as the planet warms and fire seasons lengthen, smoke is becoming a defining feature of many ecosystems, and the animals within them will have to endure it.
That reality gives added weight to the quiet observation on a Massachusetts hillside. The songs of the Eastern Wood-Pewee and the calls of the goldfinch are not merely pleasant background music. They are evidence of lives that wildfire smoke can reach, disrupt, and perhaps endanger — and of a scientific mystery that researchers are only beginning to unravel.
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