Editing Common chiffchaff (section)

==Status==
The common chiffchaff has an enormous range, with an estimated global extent of 10&nbsp;million&nbsp;square kilometres (3.8&nbsp;million square miles) and a population of 60–120 million individuals in Europe alone. Although global population trends have not been quantified, the species is not believed to approach the thresholds for the population decline criterion of the [[IUCN Red List]] (that is, declining more than 30 percent in ten years or three generations). For these reasons, the species is evaluated as "[[least concern]]".<ref name=IUCN/>

None of the major subspecies is under threat, but ''exsul'', as noted above, is probably extinct. There is a slow population increase of common chiffchaff in the Czech Republic.<ref>{{in lang|cs}} [http://jpsp.birds.cz/vysledky.php?taxon=781 Budníček menší (Phylloscopus collybita)]. Česká společnost ornitologická (Czech Society for Ornithology), accessed 20 April 2009</ref> The range of at least ''P. c. collybita'' seems to be expanding, with northward advances in [[Scotland]], [[Norway]] and [[Sweden]] and a large population increase in [[Denmark]].<ref name=BWP>{{cite book | editor1-last = Snow  | editor1-first =  David  |editor2-last= Perrins|editor2-first=Christopher M.| title = The Birds of the Western Palearctic concise edition | volume=2: Passerines | publisher = Oxford University Press |year = 1998| location =Oxford | isbn = 978-0-19-854099-1 | pages=1337–1339 }}</ref>