Shrinking North American bird population is getting worse faster. Experts blame agriculture, warming

Published: Thursday, February 26, 2026 at 7:22 pm

Bird Population Decline Accelerates Across North America

A new study reveals a concerning trend: the decline of North American bird populations is not only continuing but accelerating. The research, published in the journal *Science*, examined the rate of bird population loss across 261 species, finding that over half are experiencing increasingly rapid declines since 1987.

The study highlights two primary drivers of this alarming trend: intensive agriculture and rising temperatures. Researchers found a strong correlation between the acceleration of bird losses and agricultural practices, including high fertilizer and pesticide use, as well as the expansion of cropland. Warmer temperatures, linked to human-caused climate change, were also statistically connected to significant population declines, particularly in regions experiencing the most warming.

While the study notes that the fastest-declining species, such as starlings and house sparrows, currently have large populations, experts warn that these declines could foreshadow future species extinctions. The research also underscores the broader environmental implications, with one expert noting that if the environment cannot support adaptable species, it signals potential toxicity for humans and other life.

The study's findings emphasize the interconnectedness of environmental factors. The impact of agricultural practices is amplified in regions experiencing the most warming, creating a combined effect on bird populations. Experts emphasize the importance of addressing both climate change and agricultural practices to mitigate further losses. The study also highlights the vital role birds play in the ecosystem, including pest control, pollination, and even contributing to human well-being.

BNN's Perspective:

This study serves as a stark reminder of the environmental challenges we face. While the findings are concerning, they also provide a clear call to action. Addressing the issue requires a balanced approach that considers both environmental and economic factors. Promoting sustainable agricultural practices and implementing effective climate change mitigation strategies are crucial steps. Finding common ground and fostering collaboration between environmental advocates, policymakers, and the agricultural industry is essential to protect these vital species and the ecosystems they support.

Keywords: bird population decline, North America, agriculture, climate change, species extinction, environmental impact, conservation, warming temperatures, agricultural practices, pesticides, fertilizer, cropland, ecosystem, sustainable agriculture, climate change mitigation

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