The Willow Warbler (Phylloscopus trochilus) is a very common and widespread leaf warbler which breeds throughout northern and temperate Europe and Asia, from Ireland east to the Anadyr River basin in eastern Siberia. It is strongly migratory, with almost
Willow warblers are small birds with grey-green backs and pale under parts. They have a yellow tinged chest and throat and a pale stripe above the eye). They are separated from the very similar chiffchaff by their song.