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A pair of oriental pied hornbills are seen in a mangrove forest at Singapore's Pasir Ris Park on Feb. 24, 2021. (Photo by Then Chih Wey/Xinhua)
A pair of oriental pied hornbills are seen in a mangrove forest at Singapore's Pasir Ris Park on Feb. 24, 2021. (Photo by Then Chih Wey/Xinhua)