Western Olivaceous Warbler
Western Olivaceous WarblerWestern Olivaceous WarblerWestern Olivaceous WarblerWestern Olivaceous Warbler

Western Olivaceous Warbler

Iduna opaca

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
Insufficient data
overall probability at Sierra Nevada National Park
3 Verified records at Sierra Nevada National Park
☀️ Diurnal When it's active during daytime hours (6am–6pm)

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. Wikipedia →

Closest Relatives at Sierra Nevada National Park

Eurasian Reed-Warbler
LC

Eurasian Reed-Warbler

☀️ Diurnal Bird

Acrocephalus scirpaceus

5–10% · With luck
Melodious Warbler
LC

Melodious Warbler

☀️ Diurnal Bird

Hippolais polyglotta

<5% · Rare
Great Reed-Warbler
LC

Great Reed-Warbler

☀️ Diurnal Bird

Acrocephalus arundinaceus

<5% · Rare
Sedge Warbler
LC

Sedge Warbler

☀️ Diurnal Bird

Acrocephalus schoenobaenus

<5% · Rare
Moustached Warbler

Moustached Warbler

Bird

Acrocephalus melanopogon

Insufficient data
Eurasian Blackbird
LC Endemic

Eurasian Blackbird

☀️ Diurnal Bird

Turdus merula

80–90% · Very likely
European Serin
LC

European Serin

🌅 Crepuscular Bird

Serinus serinus

60–70% · Likely
Eurasian Goldfinch
LC

Eurasian Goldfinch

☀️ Diurnal Bird

Carduelis carduelis

60–70% · Likely
Great Tit
LC Endemic

Great Tit

☀️ Diurnal Bird

Parus major

60–70% · Likely
Blackcap
LC

Blackcap

☀️ Diurnal Bird

Sylvia atricapilla

60–70% · Likely
Sardinian Warbler
LC Endemic

Sardinian Warbler

🌅 Crepuscular Bird

Curruca melanocephala

50–60% · Likely
Spotless Starling
LC

Spotless Starling

🌅 Crepuscular Bird

Sturnus unicolor

50–60% · Likely

📅 Monthly Probability

📊

Fewer than 5 records of Western Olivaceous Warbler at Sierra Nevada National Park — not enough to chart months honestly.

☀️ When They're Spotted

Most active during daytime hours (6am–6pm) · across all parks (global)

☀️Diurnal
☀️🌙🌙12am6am12pm6pm12am

Global Distribution

Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.

where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is)  ·  parks where it occurs — tap a pin for the sighting probability there

Parks Where Found

# Park Country Probability
1 Niokolo-Koba National Park 🇸🇳 Senegal
20–30%
2 Doñana National Park 🇪🇸 Spain
5–10%
3 Sierra Nevada National Park 🇪🇸 Spain
Insufficient data
4 Monfragüe National Park 🇪🇸 Spain
Insufficient data
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