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. Phylloscopidae contains two genera, Phylloscopus and Seicercus, respectively containing around 55 and 11 species. The Leaf-Warblers are a branch of "Old World Warblers," one of 10 or more branches that sprouted as Families with the break-up of the Sylviidae.
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). Many species are more easily identified by their distinctive songs than their dull plumage.
Behavior and Ecology
The Phylloscopidae comprises many small tree-loving warbler species. Many are canopy or sub-canopy dwellers, gleaning insects from leaves or catching food on the wing. 
There are many species breeding at temperate and high latitudes in Eurasia that migrate substantial distances to winter in southeast Asia, India, or Africa. An example is Tickell's Leaf Warbler, which breeds in scrub at high elevation in the Himalayas and on the Tibetan Plateau and then moves downslope and south to winter in the Himalayan foothills of India and Burma.
- Alström, Per; Ericson, Per G.P.; Olsson, Urban & Sundberg, Per (2006): Phylogeny and classification of the avian superfamily Sylvioidea. Molecular Phylogenetics and Evolution 38(2): 381–397. doi:10.1016/j.ympev.2005.05.015 PMID 16054402
- Baker, Kevin (1997): Warblers of Europe, Asia, and North Africa. Princeton University Press, Princeton, N.J. ISBN 0-691-01169-9
- Del Hoyo, J.; Elliot, A. & Christie D. (editors). (2006). Handbook of the Birds of the World. Volume 11: Old World Flycatchers to Old World Warblers. Lynx Edicions. ISBN 84-96553-06-X.
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