Ye Gong, Nehafta Bibi and Haitao Wang*
...ified as successful nest usurpation: in six cases nests of other birds were usurped by Mandarin duck and in three cases nests of Mandarin duck were usurped by other birds. The remaining mixed clutches may be incomplete usurpation. For the nests taken over by Mandarin ducks, all heterospecific eggs were rejected and four clutches were incubated successfully. For the other mixed clutches, none of Mandarin duck eggs were remove...
