Western Olivaceous Warbler

Iduna opaca (Cabanis, 1851)

9 gWeight

The western olivaceous warbler (Iduna opaca), also known as the isabelline warbler, is a "warbler", formerly placed in the Old World warblers when these were a paraphyletic wastebin taxon.

Busiest months: April–May · Most records: Spain, Morocco, Gambia

Least Concern

Where and when it's recorded

Western Olivaceous Warbler has been recorded at 140 of the 8,171 birding hotspots we track, in 19 countries and regions.

Records by month Northern Hemisphere

Where it's recorded most

Dehesa de AbajoSpain245 records
Oued Massa – champs d'AghorimzeMorocco228 records
Lagunas de Camino ColoradoSpain208 records

More places

Córdoba – Sotos de AlbolafiaSpain202 records
Badajoz – Azud del GuadianaSpain199 records
Brazo del Este PjeNat – ÁreaSpain186 records
Bango – Djeuss et berges jusqu'à SanarSenegal162 records
Campement de WassadouSenegal134 records
Desembocadura del Guadalhorce – ÁreaSpain128 records
PN Sous-Massa – Estuaire de l'Oued MassaMorocco123 records

Countries and regions with the most records

Spain Morocco Gambia Senegal Burkina Faso Ghana Tunisia Western Sahara

eBird records via GBIF up to 2024-12-31. A record means someone listed it; more records partly mean more birders, not more birds.

About

The western olivaceous warbler (Iduna opaca), also known as the isabelline warbler, is a "warbler", formerly placed in the Old World warblers when these were a paraphyletic wastebin taxon. It is now considered a member of the acrocephaline warblers, Acrocephalidae, in the tree warbler genus Iduna. It was formerly regarded as part of a wider "olivaceous warbler" species, but as a result of modern taxonomic developments, this species is now usually considered distinct from the eastern olivaceous warbler, Iduna pallida.

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