Cuckoo is based on a traditional European folk melody inspired by the characteristic two-note call of the cuckoo bird, commonly associated with spring and renewal. The use of simple intervallic imitation of bird calls has a long history in European music, appearing in both folk traditions and later art music. Transmitted orally across generations, the melody reflects collective musical practice rather than individual authorship. Shinichi Suzuki selected and adapted this tune for the Suzuki Piano School, Volume 1, incorporating it into a progressive repertoire designed to foster listening skills, tonal awareness and early musical expression.