Newborn wild whistling ducklings make their first appearance at the Gardens by the Bay in Singapore, on June 27, 2019. (Xinhua/Then Chih Wey)

Newborn wild whistling ducklings are seen at the Gardens by the Bay in Singapore, on June 28, 2019. (Xinhua/Then Chih Wey)

Newborn wild whistling ducklings make their first appearance at the Gardens by the Bay in Singapore, on June 27, 2019. (Xinhua/Then Chih Wey)

Newborn wild whistling ducklings are seen at the Gardens by the Bay in Singapore, on June 28, 2019. (Xinhua/Then Chih Wey)

Newborn wild whistling ducklings are seen at the Gardens by the Bay in Singapore, on June 28, 2019. (Xinhua/Then Chih Wey)