![Three Sumatran Tiger cubs are released into the enclosure for display to the public for the first time at Taronga Zoo in Sydney on March 29, 2019. (Photo/Agencies)](http://www.ecns.cn/hd/2019/03/29/f49eb3c0ad1f4c7e9b3a206cf0cc8048.jpg)
Three Sumatran Tiger cubs are released into the enclosure for display to the public for the first time at Taronga Zoo in Sydney on March 29, 2019. (Photo/Agencies)
![Two Sumatran tiger cubs look on at Taronga Zoo in Sydney, Australia, March 29, 2019. (Photo/Agencies)](http://www.ecns.cn/hd/2019/03/29/b5761d841b554ad89f98858f5317bbb1.jpg)
Two Sumatran tiger cubs look on at Taronga Zoo in Sydney, Australia, March 29, 2019. (Photo/Agencies)
![Zookeepers pose with three Sumatran tiger cubs at Taronga Zoo in Sydney, Australia, March 29, 2019. (Photo/Agencies)](http://www.ecns.cn/hd/2019/03/29/5d4c341e542d403c8cdd5addc1fb79c7.jpg)
Zookeepers pose with three Sumatran tiger cubs at Taronga Zoo in Sydney, Australia, March 29, 2019. (Photo/Agencies)