Birds
A territorial hybrid Western Bonelli’s Warbler x Wood Warbler at Herselt

Western Bonelli's Warbler

Western Bonelli's Warbler

75
1 week ago
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The Western Bonelli's Warbler is a subtle, grey-green warbler of open woodlands, characterized by its pale underparts and yellowish-green rump. It is often identified by its simple, distinctive song.
Where to spot
Breeds in Southern and Western Europe, primarily in open deciduous and mixed woodlands, often on hillsides. Winters in tropical West Africa.
How to spot
Look for its plain greyish-green upperparts, pale underparts, and a noticeable yellowish-green rump (often visible in flight). Listen for its simple, repetitive 'phillip-phillip-phillip' song, which is key to distinguishing it from its eastern counterpart.
When to spot
Observed during the breeding season from spring to late summer. Migratory passage occurs in spring and autumn.
A territorial hybrid Western Bonelli’s Warbler x Wood Warbler at Herselt
A territorial hybrid Western Bonelli’s Warbler x Wood Warbler at Herselt
Credits: Guy L Janssens
The two Bonelli's Warbler species (Western and Eastern) were long considered a single species until genetic and song differences revealed them to be distinct.
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