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Patrick J. O'Keeffe / Raw Birds
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The Willow Warbler (Phylloscopus trochilus) is of the family Phylloscopidae which is in the genus Phylloscopus. This insectivorous leaf warbler is a common and widespread summer resident from mid April to late September which breeds throughout the northern and temperate regions of Eurasia. It is strongly migratory, with almost all of the population wintering in sub-Saharan Africa. It is a bird of open woodlands with a preference for habitats that include birch, alder and willow trees as well as ground cover for nesting.