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Willow warbler UK09.JPG
Willow warbler
Phylloscopus trochilus
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Suborder: Passeri
Family: Phylloscopidae
Alström, Ericson, Olsson, & Sundberg, 2006[verification needed]


Phylloscopidae is a newly described family of small insectivorous birds formerly placed in the Old World warbler family. Its members occur in Eurasia, ranging into Wallacea and Africa (and the Arctic warbler breeding east into Alaska). Most live in forest and scrub and frequently catch food on the wing.

The species are of various sizes, often green-plumaged above and yellow below, or more subdued with greyish-green to greyish-brown colours, varying little or not at all with the seasons. The tails are not very long and contain 12 feathers (unlike the similar Abroscopus species, which have 10 tail feathers).

Phylloscopidae contains two genera, Phylloscopus and Seicercus, respectively containing around 55 and 11 species.