Hsueh-wen Chang

Nest Recognition of Two Terns: Nest Recognition of Black-naped Tern (Sterna Sumatrana) and Roseate Tern (Sterna Dougallii) Hsueh-wen Chang

Terns usually will aggregate in the same reproduction area during breeding season. The color pattern of eggs may match the background, and it is important for breeding adults to distinguish their own eggs, especially in colonies with high density. This research was carried out at Penghu of Taiwan. In conclusion, terns have low ability of egg recognition but high ability of nest recognition. Terns presumably can recognize nests with the nearby environmental landmarks, but not be able to recognize eggs.