Editing Common cuckoo (section)

==Voice and courting==
[[File:Cuculus canorus.ogg|thumb|right|200px|Common cuckoo song, Kaluga region, Russia]]
The male's song,  ''goo-ko'', is usually given from an open perch. During the breeding season the male typically gives this vocalisation with intervals of 1&ndash;1.5 seconds, in groups of 10&ndash;20 with a rest of a few seconds between groups. The female has a loud bubbling call.<ref name=BWP/> The song starts as a descending minor third early in the year in April, and the interval gets wider, through a major third to a fourth as the season progresses, and in June the cuckoo "forgets its tune" and may make other calls such as ascending intervals. The wings are drooped when the bird is calling intensely, and when in the vicinity of a potential female, the male often wags its tail from side to side or the body may pivot from side to side.<ref>{{cite book|title=Handbook of the birds of India and Pakistan together with those of Bangladesh, Nepal, Bhutan and Ceylon. Volume 3. Stone Curlews to Owls. |author1=Ali, Salim| author2=Ripley, S. Dillon| edition=2nd| publisher=Oxford University Press| year=1981|page=209}}</ref>