Bonelli's Warbler
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The Bonelli's Warbler, Phylloscopus bonelli, is an Old World warbler in the leaf warbler genus Phylloscopus. As a result of modern taxonomic developments, it is now usually considered to be two species:
- Western Bonelli's Warbler, Phylloscopus bonelli, which breeds in south west Europe and north Africa
- Eastern Bonelli's Warbler, Phylloscopus orientalis, which breeds in south east Europe and Asia Minor
Both species are migratory, wintering in sub-Saharan Africa. They are both rare vagrants in Northern Europe.
These small passerine birds are found in forest and woodland. 4-6 eggs are laid in a nest on the ground. Like most warblers, Bonelli's is insectivorous.
These are small warblers. The adults of both species have a plain grey-green back, green-toned rump and wings and whitish underparts. The bill is small and pointed and the legs brown. The sexes are identical, as with most warblers.
Western Bonelli's Warbler has a browner tinge to the upperparts than Eastern Bonelli's Warbler. Eastern Bonelli's Warbler sometimes has a greenish tinge to its upperparts. The song of both species is a fast monotone trill, with only slight differences between the two, and also some similarity to Wood Warbler. The call of the Western Bonelli's Warbler is a disyllabic hu-it, that of the Eastern a completely different hard chup, reminiscent of a Crossbill or a House Sparrow.
This bird is named after the Italian ornithologist Franco Andrea Bonelli.de:Berglaubsänger nl:Bergfluiter