These rare quintuplet Siberian tiger cubs are being hand-raised after they were rejected by their mother.
The cubs—two girls and three boys— were born last month at a breeding center in Harbin, the capital of Heilongjiang Province in northeast China.
Most Siberian tigers give birth to two to four cubs at a time, and not only is it very rare to see quintuplets born healthy, but it's even less likely that they'll survive in the wild.
Li Xin, a breeder at the center, told the Associated Press that the mother of the cubs shied away from them when they crawled toward her, so they decided to raise them by hand.
They feed the newborns milk from bottles every three hours, and the healthy cubs have been growing at a fast rate of 50 grams (1.8 ounces) every day.
The quintuplets are an especially welcome surprise, as Siberian tigers are endangered. The center is expecting a record-high number of 150 cubs by the end of August.