Although the duck is technically wild, it has become Hedvig's pet and lives at her family's home. While out hunting, Gregers's father, Hakon, who has poor eyesight, injured its wing instead of killing the ducj, which later was given to the teenage girl. Through the course of the play, Hedvig is losing her eyesight and feels increasingly isolated and lonely. In that respect, Hedvig is presented as similar to the duck because both have physical disabilities.
In addition, Hedvig is confined in a setting she has not chosen, a situation worsened by her father's rejection. She believes she can comply with the demands of adult society, represented by Gregers's idea that she prove her love for her father by getting rid of the duck. Ultimately, she proves unable to do so. The wildness in her is untamable. Rather than sacrifice the duck, she sacrifices herself. In the last regard, she differs from the duck because she can choose her fate.