Iduna opaca
The Western Olivaceous Warbler (*Iduna opaca*) is a medium-sized Old World warbler, measuring about 13-15 cm (5.1-5.9 in) in length with a wingspan of 20-22 cm (7.9-8.7 in) and weighing 11-15g. Its plumage is rather nondescript, featuring drab, warm grey-brown upperparts and dull whitish underparts, giving it a somewhat 'shadowy' appearance, as implied by its scientific name *opaca*. Key identification marks include a pale supercilium, noticeably long and pointed bill, and stout, dark legs, o...
This warbler prefers dry, open woodlands, scrublands, olive groves, and orchards, often in semi-arid environments. It can be found from sea level up to moderate elevations in hilly terrain.
Primarily insectivorous, feeding on beetles, caterpillars, flies, and other invertebrates, supplemented occasionally with spiders and small amounts of berries or fruit outside the breeding season.
Western Olivaceous Warblers are active, diurnal birds, constantly on the move through foliage while foraging. Their primary foraging strategy involves gleaning insects from leaves and branches, though they will occasionally sally forth to catch flying insects. Males are highly territorial during ...
The Western Olivaceous Warbler has a distinct migratory range spanning two continents. Its breeding grounds are primarily centered around the Iberian Peninsula, encompassing most of Spain and Portugal, and extending into Northwest Africa, including Morocco, Algeria, and Tunisia. During the non-br...
Least Concern
- The scientific name *Iduna opaca* refers to its somewhat 'dull' or 'shadowy' plumage, distinguishing it from its brighter relatives. - It was formerly placed in the genus *Hippolais*, but genetic studies led to its reclassification into the re-established genus *Iduna*. - Despite its drab appea...