Analysis Summary:

The article is mostly accurate, reflecting the general consensus on declining bird populations and potential causes. There's a slight bias towards alarmism, but the core claims are supported by multiple sources. The article could benefit from more specific data and less reliance on emotionally charged language.

Detailed Analysis:

• Claim:** Researchers say bird populations are declining across every habitat.
  • Verification Source #4: Supports this claim, stating scientists checked in on species all over the country and found declines nearly everywhere.
  • Verification Source #2: Supports this claim, noting the alarming collapse of bird populations.
• Claim:** The worst declines are in grassland birds and shorebirds.
  • Verification Source #3: Supports this claim, stating grassland bird populations have declined by 53%.
  • Verification Source #1: *Fails to cover* this specific claim.
  • Verification Source #4: *Fails to cover* this specific claim about shorebirds, but supports the general decline.
• Claim:** Scientists blame drastic changes in bird migration paths on invasive species, new land use, pollution and climate change.
  • Verification Source #2: Supports this claim, mentioning declining bird populations and linking it to environmental factors.
  • Verification Source #4: Supports this claim, mentioning the alarming decline of bird populations.
  • Verification Source #1: *Fails to cover* the specific causes of migration path changes.
• Claim:** Tim McNicholas reports.
• This is an attribution statement. Its accuracy cannot be verified by the provided sources.

Supporting Evidence/Contradictions:

• Agreement:** Multiple sources (Verification Source #2, Verification Source #4) agree on the overall decline in bird populations.
• Agreement:** Verification Source #3 specifically highlights the decline in grassland bird populations, supporting the article's claim.
• Lack of Coverage:** Some sources (Verification Source #1) do not cover all the specific claims made in the article, such as the causes of migration path changes.
• Bias:** The use of words like "alarming collapse" (Verification Source #2) and "drastic changes" in the article snippet suggests a slight bias towards alarmism.