Acrocephalus kerearako
The Cook Reed Warbler (Acrocephalus kerearako) is a charismatic yet elusive passerine endemic to the wetlands of the central South Pacific. Measuring approximately 14.5 cm in length with a wingspan of 19-21 cm and weighing 12-16 grams, this small warbler exhibits a generally unassuming plumage of olive-brown upperparts, paler, cream-buff underparts, and a distinct, pale supercilium that extends behind the eye. Its slender, pointed bill is dark above and paler below, while its relatively stron...
Exclusively found in dense freshwater and brackish wetland vegetation, including reed beds, taro patches, and mangrove fringes, typically below 100 meters elevation.
Primarily insectivorous, feeding on a wide variety of small insects (beetles, flies, moths, larvae) and spiders, gleaned from wetland vegetation or caught in short aerial pursuits.
Cook Reed Warblers are primarily diurnal, exhibiting peak activity during early morning and late afternoon, often retreating into dense foliage during the hottest parts of the day. They roost solitarily or in pairs deep within the protective cover of reed beds. Foraging involves agile gleaning of...
The Cook Reed Warbler is strictly endemic to the Cook Islands, primarily restricted to the larger islands of Rarotonga and Aitutaki. Its breeding range encompasses the available freshwater and brackish wetland areas, including valley bottom swamps, taro patches, and lagoon-side mangrove fringes o...
Vulnerable
- The Cook Reed Warbler's song is so complex and varied that individual males can be identified purely by their unique vocal repertoire, often incorporating mimicry of other local bird species. - Despite its 'reed warbler' name, it builds its intricate, cup-shaped nest not only in reeds but also ...