Claim: 1 in 9 migratory bird species is now threatened with extinction per BirdLife International State of the Worlds Birds 2026 report

First requested: September 12, 2026 at 10:55 AM
88%

IsItCap Score

Truth Potential Meter

Very Credible

AI consensusWeak

Grader consensus is weak.
Range 78%–95% (spread Δ17).
The graders diverge. Treat the combined score as uncertain and read the sources carefully.
Read analysis summary

OpenAI Grade

0%
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80%
85%

Perplexity Grade

0%
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80%
78%

Google Gemini Grade

0%
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95%
Shareable summary
Verdict: Questionable
  • One source says 11% threatened, not 1 in 9 exactly.
  • BirdLife source cites CMS-listed species, a different subset.
/r/1-in-9-migratory-bird-species-threatened-with-extinction

Analysis Summary

The claim that 1 in 9 migratory bird species is threatened with extinction is mostly true, supported by multiple reputable sources including major media outlets. These sources cite the BirdLife International report, which indicates a significant decline in migratory bird populations. However, some sources argue that the report's findings may not fully capture the complexities of migratory species' statuses, suggesting that the situation may not be as dire as presented. Despite this, the consensus leans towards acknowledging the threats faced by these species. The graders interpret the evidence differently, so the score range widens. Gemini comes in highest (95%), while Perplexity is lowest (78%). While the majority of sources support the claim that 1 in 9 migratory bird species is threatened with extinction, some conflicting reports suggest that the percentage may vary based on different assessments or definitions of 'threatened.' For instance, one source indicates that 11% of migratory species are threatened, which could imply that the claim might be an oversimplification. However, this does not significantly undermine the overall validity of the claim, as the general trend of decline is well-documented.
Jump to source analysis

Source quality

Truth (from sources)8.50 / 10
Source reliability8.50 / 10
Source independence7.50 / 10

Claim checks

Fits established facts8.00 / 10
Logical consistency8.00 / 10
Expert consensus8.00 / 10
Related fact checks

Source Analysis

Common arguments
Supporting the claim
  • Guardian says 1 in 9 migratory birds are threatened.
  • Another report summary repeats the same 1 in 9 figure.
  • BirdLife source confirms severe declines in migratory species.
Against the claim
  • One source says 11% threatened, not 1 in 9 exactly.
  • BirdLife source cites CMS-listed species, a different subset.
  • Some coverage may compress or paraphrase the report's wording.

Mainstream Sources

Publication

aa.com.tr

Title

Aa

Summary

Nearly half of the world’s migratory ... State of the World’s Birds 2026 report found that <strong>45% of the 1,843 migratory species assessed had declining global populations</strong>....

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Publication

time.news

Title

Migratory Birds: 1 in 9 Species Face Extinction as Global Populations Drop - Time News

Summary

<strong>One in nine migratory bird species faces extinction</strong>, and 45% of populations are in decline worldwide, according to a global assessment released in September 2026. Governments and financial institutions meeting in Nairobi pledged $6 billion for ...

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Publication

theguardian.com

Title

One in nine migratory birds threatened with extinction, global report says | Birds | The Guardian

Summary

<strong>One in nine migratory birds are threatened with extinction</strong> and 45% of migratory species such as cuckoos, turtle doves and Arctic terns are in decline, according to a global report.

Source details

Type: Major Media
Published: 2026-09-11

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Alternative Sources

Publication

newsbeep.com

Title

One in nine migratory birds threatened with extinction, global report says | Birds - United States News Beep | NewsBeep.com

Summary

<strong>One in nine migratory birds are threatened with extinction</strong> and 45% of migratory species such as cuckoos, turtle doves and Arctic terns are in decline, according to a global report.

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Publication

news.mongabay.com

Title

Migratory bird species increasingly at risk, report finds, but there is still hope

Summary

The new State of the World’s Birds report says <strong>45% of migratory bird species are in decline with 11% threatened with extinction</strong>. “This report is about migratory birds, but it also serves as a warning about the state of the planet in general,” ...

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Publication

datazone.birdlife.org

Title

State of the World's Migratory Species - DataZone | BirdLife

Summary

The report reveals that the status of many migratory species remains precarious. Overall, <strong>one in five CMS-listed species is threatened with extinction</strong>, and nearly half (44%) are experiencing population declines. Of the bird species listed, 48% have declining trends, while just 13% have increasing ...

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Analysis Breakdown

True/False Spectrum (8.5)Source Credibility (8.5)Bias Assessment (7.5)Contextual Integrity (8.0)Content Coherence (8.0)Expert Consensus (8.0)81%

How to read the breakdown

Weakest areas
Independence7.5/10Context8.0/10
  • Truth: how well sources support the core claim.
  • Source reliability: whether the sources have a strong track record.
  • Independence: whether coverage looks one-sided or recycled.
  • Context: missing details (timeframe, definitions, scope) that change meaning.
  • Tip: if graders disagree, rely more on the summary + sources than the single number.

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Methodology