The Willow Warbler (formerly called the Willow Wren) Phylloscopus trochilus, is a very common and widespread leaf warbler which breeds throughout northern and temperate Europe and Asia.

Willow Warbler, Fitis, Felosa-musical, Mosquitero de los Sauces

It was described by Linnaeus in his Systema Naturae in 1758 under the genus Motacilla.

This "warbler" is strongly migratory and the majority of the population winters in sub-Saharan Africa. It is one of the first leaf warblers to return in the spring but is later than the Chiffchaff, Phylloscopus collybita.

This is a bird of open woodlands with trees and ground cover for nesting, including birch and willow uplands. The nest is usually built in close contact with the ground, often in low vegetation. Like most Old World warblers, this small passerine is insectivorous.

This is a typical leaf warbler in appearance, greenish brown above and off-white below. It is very similar to the Chiffchaff, but non-singing birds can be distinguished from that species by their paler legs, longer paler bill, more elegant shape and longer primary projection. Its song is a simple repetitive descending whistle.

Afrikaans: Hofsanger
Asturian: Pioyín de Ríu, Pioyín de Sebe
Azerbaijani: Bahar yarpaqgüd?ni
Breton: Ar puig-haleg
Catalan: Busquereta vulgar, Mosquiter de passa, Ull de bou de passa
Catalan (Balears): Ull de bou de passa
Valencian: Busquereta vulgar
Czech: Budnícek vetší
Welsh: Cethlydd y coed, Dryw bach y ddaear, Dryw felen, Dryw wen, Dryw'r helyg, Sywider, Telor yr helyg
Danish: Løvsanger, Lundsanger
German: Fitis, Fitislaubsänger
Emiliano-romagnolo: Becafigh
English: European Willow Warbler, European Willow-Warbler, Leaf Warbler, Northern Willow-Warbler, Willow Leaf-warbler, Willow Warbler, Willow wren, Willow-Warbler
Esperanto: fitiso
Spanish: Mosquitero común, Mosquitero de los Sauces, Mosquitero Musical
Estonian: Salu-lehelind
Basque: Mosquiter de passa , Txio hori, Txio horia
Finnish: Pajulintu
Faroese: Leyvljómari
French: Pouillot chantre, Pouillot fitis
Irish: Ceolaire Sailí, Ceólaire sailí
Gaelic: Crionag Ghiuthais
Galician: Mosquiter de passa , Picafollas musical
Manx: Drean bane, Drean Vane
Croatian: Brezov Zviždak
Hungarian: Fitisz füzike, Fitiszfüzike
Armenian: Garnanayin Geghgeghik
Icelandic: Laufsöngvari
Italian: Luí grosso, Luì grosso, LuÏ grosso
Japanese: Kitayanagi mushi-kui, kitayanagimushikui
Cornish: Telor helyk
Kwangali: Niini
Latin: Phylloscopus trochilus
Limburgish: Favet, Graastäöt, Taatsj
Maltese: Vjolin Pastard
Dutch: Fitis
Norwegian: Løvsanger
Polish: piecuszek
Portuguese: felosa musical, Felosa-musical
Romansh: Fegliarel musicant
Russian: Penochka-vesnichka
Scots: Crionag ghiuthais
Northern Sami: Rievssatcizaš
Slovak: Kolibiarik spevavý, Kolibkárik spevavý
Slovenian: kovacek, severni kovacek, severni kova?ek
Shona: Timba
Albanian: Fishkëllyesi gushëverdhë
Serbian: brezov zviždak, zviždak kovacic
Sotho, Southern: Pilipili-sa-mabelete
Swedish: Lövsångare
Swahili: Kucha-mbuga
Xhosa: Unothoyi