High Quality Content by WIKIPEDIA articles! The Eastern Olivaceous 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 warbelrs, Acrocephalidae, in the tree warbler genus Hippolais . 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 to be two species. It is a small passerine bird, found in dry open country, including cultivation, with bushes or some trees. 2-3 eggs are laid in a nest in low in undergrowth or a bush. Like most warblers, Eastern Olivaceous is insectivorous.