A heron bird flies over its colony at Petulu Gunung village in Gianyar district of Bali, Indonesia, on Dec. 11, 2019. (Photo by Veri Sanovri/Xinhua)

A heron bird flies at Petulu Gunung village in Gianyar district of Bali, Indonesia, Dec. 11, 2019. (Photo by Veri Sanovri/Xinhua)

Heron birds perch on the tree at Petulu Gunung village in Gianyar district of Bali, Indonesia, on Dec. 11, 2019. (Photo by Veri Sanovri/Xinhua)