Editing Common chiffchaff (section)

===Territory===
[[File:Siberian Chiffchaff I IMG 9454.jpg|thumb| upright| Siberian chiffchaff near [[Hodal]], India]]
The male common chiffchaff is highly territorial during the breeding season, with a core territory typically {{convert|20|m|ft|abbr=off}} across, which is fiercely defended against other males. Other small birds may also be attacked.{{sfn|Clement|1995|pp=80–84}} The male is inquisitive and fearless, attacking even dangerous predators like the [[stoat]] if they approach the nest, as well as egg-thieves like the [[Eurasian jay]].{{sfn|Clement|1995|p=74}} His song, given from a favoured prominent vantage point, appears to be used to advertise an established territory and contact the female, rather than as a paternity guard strategy.<ref name= Rodrigues >{{cite journal|last= Rodrigues|first= Marcos |s2cid= 53189826 |date=1996 |title= Song activity in the chiffchaff: territorial defence or mate guarding? |journal=  Animal Behaviour|volume= 51|issue= 3|pages= 709–716 |doi= 10.1006/anbe.1996.0074}}</ref>

Beyond the core territory, there is a larger feeding range which is variable in size, but typically ten or more times the area of the breeding territory. It is believed that the female has a larger feeding range than the male.{{sfn|Clement|1995|p=80}} After breeding has finished, this species abandons its territory, and may join small flocks including other warblers prior to migration.<ref name=BWP/>