Editing Common chiffchaff (section)

==Distribution and habitat==
The common chiffchaff breeds across Europe and Asia east to eastern [[Siberia]] and north to about 70°N, with isolated populations in northwest Africa, northern and western [[Turkey]] and northwestern [[Iran]].{{sfn|Clement|1995|p=30}} It is migratory, but it is one of the first [[passerine]] birds to return to its breeding areas in the spring and among the last to leave in late autumn.<ref name = Collins/><ref name =BWP/> When breeding, it is a bird of open woodlands with some taller trees and ground cover for nesting purposes. These trees are typically at least {{convert|5|m|ft|abbr=off}} high, with undergrowth that is an open, poor to medium mix of grasses, [[bracken]], nettles or similar plants. Its breeding habitat is quite specific, and even near relatives do not share it; for example, the [[willow warbler]] (''P. trochilus'') prefers younger trees, while the [[wood warbler]] (''P. sibilatrix'') prefers less undergrowth.{{sfn|Clement|1995|pp=44–45}} In winter, the common chiffchaff uses a wider range of habitats including scrub, and is not so dependent on trees. It is often found near water, unlike the willow warbler which tolerates drier habitats.{{sfn|Clement|1995|pp=52–54}} There is an increasing tendency to winter in western Europe well north of the traditional areas, especially in coastal southern [[England]] and the mild urban [[microclimate]] of [[London]].{{sfn|Clement|1995|pp=40–43}} These overwintering common chiffchaffs include some visitors of the eastern subspecies ''abietinus'' and ''tristis'', so they are certainly not all birds which have bred locally, although some undoubtedly are.<ref name =BWP/>