The video shows over 600 migratory swans wintering in the Manasi Lake Region Wetlands Park in northwest China's Xinjiang Uygur Autonomous Region. White feather in white snow has become a poetic painting. However, swans in snow may make you worry about one thing: what do they eat? Continuous temperature drop and frozen lakes make it difficult for the birds to forage. Luckily, they have been fed corn by the park's workers.

Since December 10, the park has been hit by dense fog and snow, with the lowest temperature down to minus 18 degrees Celsius with about 90 percent of the lakes frozen.

Thick snow and ice have seriously affected the birds in finding food, and the birds have to survive on the poor rhizomes and leaves.

In order to help the birds, workers of the park, braving the freezing cold, bring bags of corn to their habitat for their breakfast every morning. The corn they send every day has been increased to over 400 kilograms from more than 300 kilograms last year .

"Because of its high protein content, corn can be used to replenish energy for swans to fly southward and northward in next year. I estimate that a few days later, after the Winter Solstice, most parts of the lake will have been frozen, so we will increase the protection to break the ice and clear the lake reeds, so that our swans can safely winter here," said Zhang Shuqin, a worker of the park.

(Cover image a still from the video, edited by An Qi)

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