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AI Summary of Peer-Reviewed Research

This page presents an AI-generated summary of a published research paper. The original authors did not write or review this article. [See full disclosure ↓]

Publishing process signals: STRONG — reflects the venue and review process. — venue and review process.

Bird declines are accelerating in agricultural regions

Golden grain stalks sway in a cultivated field under blue sky with white clouds, showing a natural agricultural landscape.
Pixabay • R0bin · Pixabay License
Research area:Environmental ScienceAvian ecology and behaviorAbundance (ecology)

What the study found

North American bird abundance declined across the continent from 1987 to 2021, and this decline was often accelerating. The study also found hotspots of accelerating decline in the Mid-Atlantic, Midwest, and California, with patterns matching agricultural intensity.

Why the authors say this matters

The authors conclude that the findings raise concerns for a large part of North American bird populations. The study suggests that the spatial pattern of accelerating decline may indicate agricultural intensity is a driver of the trend.

What the researchers tested

The researchers analyzed abundance change and its acceleration using 1,033 North American Breeding Bird Survey routes. They examined 261 bird species, 54 avian families, and 10 habitats over the period 1987 to 2021.

What worked and what didn't

The analysis showed an average continent-wide decline of bird abundance per local route, with decline hotspots in the southern and warmer parts of North America. Among 261 species, 122 species (47%) showed significant declines, 63 of those also showed acceleration of decline, and 67 showed declining per-capita growth rate.

What to keep in mind

The abstract does not describe detailed limitations beyond the scope of the data and analyses used. The study reports associations with agricultural intensity, but the abstract does not state direct causation.

Key points

  • Bird abundance declined across North America from 1987 to 2021.
  • Hotspots of accelerating decline were found in the Mid-Atlantic, Midwest, and California.
  • The spatial pattern of accelerating decline matched agricultural intensity.
  • 122 of 261 species showed significant declines, and 63 of those also showed acceleration of decline.
  • The authors conclude the findings raise concerns for a large part of North American bird populations.

Disclosure

Research title:
Bird declines are accelerating in agricultural regions
Publication date:
2026-02-26
DOI:
10.1126/science.ads0871
OpenAlex record:
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Image credit:
Pixabay • R0bin · Pixabay License
AI provenance: AI provenance information is not available for this post.

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