A male baby zebra (L) accompanied by his mother makes its debut at the Los Angeles Zoo in Los Angeles, the United States, June 20, 2019. (Xinhua/Qian Weizhong)

A male baby zebra (L) accompanied by his mother makes its debut at the Los Angeles Zoo in Los Angeles, the United States, June 20, 2019. (Xinhua/Qian Weizhong)

A male baby zebra (R) accompanied by his mother makes its debut at the Los Angeles Zoo in Los Angeles, the United States, June 20, 2019. (Xinhua/Qian Weizhong)

A male baby zebra (R) accompanied by his mother makes its debut at the Los Angeles Zoo in Los Angeles, the United States, June 20, 2019. (Xinhua/Qian Weizhong)

A male baby zebra (R) accompanied by his mother makes its debut at the Los Angeles Zoo in Los Angeles, the United States, June 20, 2019. (Xinhua/Qian Weizhong)

A male baby zebra (R) accompanied by his mother makes its debut at the Los Angeles Zoo in Los Angeles, the United States, June 20, 2019. (Xinhua/Qian Weizhong)

A male baby zebra (R) accompanied by his mother makes its debut at the Los Angeles Zoo in Los Angeles, the United States, June 20, 2019. (Xinhua/Qian Weizhong)

A male baby zebra (R) accompanied by his mother makes its debut at the Los Angeles Zoo in Los Angeles, the United States, June 20, 2019. (Xinhua/Qian Weizhong)