In the symphonic fairy tale "Peter and the Wolf" what instrument represents the duck?

"Peter and the Wolf" is a 'symphonic fairy tale for children', a musical composition written by Sergei Prokofiev in 1936. The narrator tells a children's story, while the orchestra illustrates it. It is Prokofiev's most frequently performed work, and one of the most frequently performed works in the entire classical repertoire. It has been recorded many times.

Each character of this tale is represented by a corresponding instrument in the orchestra: the bird by a flute, the duck by an oboe, the cat by a clarinet playing staccato in a low register, the grandfather by a bassoon, the wolf by three horns, Peter by the string quartet, the shooting of the hunters by the kettle drums and bass drum. Before an orchestral performance it is desirable to show these instruments to the children and to play on them the corresponding leitmotivs. Thereby, the children learn to distinguish the sonorities of the instruments during the performance of this tale.