Locally Hatched Young Willow Warblers Declined 74% in Gotland Ringing Data
Standardised ringing at Sundre Bird Observatory found 74% fewer locally hatched first-year willow warblers in 2016–2024 than in…
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News about Willow Warbler
Research, conservation and important developments connected to this species.
UK Breeding Bird Survey: Swift Index Fell 70% as Scotland’s Chiffchaff Index Rose 1,443%
The 2025 UK Breeding Bird Survey revealed steep long-term declines, major regional divergences and some striking increases, including…
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Common Grasshopper Warblers and Eurasian Tree Sparrows Declined Sharply at a Portuguese Ringing Station
A 27-year Portuguese ringing study found declines in all five long-distance migrants; common grasshopper warblers now barely occur…
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