Siberian tiger cubs flourish in Chinese breeding centers

A breeder weighs a Siberian tiger cub at the Hengdaohezi Siberian Tiger Park in Mudanjiang, Heilongjiang province. [Photo by Liu Youlin/For chinadaily.com.cn]

After days of careful nurturing, the five cubs are in good health and have been removed from the incubators.

"Their average weight has climbed from about 1.3 kilograms each when they were born to more than 2 kg," said Zang.