Willow Warbler
Phylloscopus trochilus
- Least concern
- Card rarity: Common
- Birds

The willow warbler is a very common and widespread leaf warbler which breeds throughout northern and temperate Europe and the Palearctic, from Ireland east to the Anadyr River basin in eastern Siberia. It is strongly migratory, with almost all of the population wintering in sub-Saharan Africa.
Classification
- Class
- Aves
- Order
- Passeriformes
- Family
- Phylloscopidae
- Genus
- Phylloscopus