People wearing face masks look at giraffes at the Los Angeles Zoo in Los Angeles, the United States, on Aug. 26, 2020. The Los Angeles Zoo reopened to the public on Wednesday with health precautions in place after being closed for 166 days due to the ongoing COVID-19 pandemic. (Xinhua)

A sign reminding people to practice physical distancing is seen at the Los Angeles Zoo in Los Angeles, the United States, on Aug. 26, 2020. The Los Angeles Zoo reopened to the public on Wednesday with health precautions in place after being closed for 166 days due to the ongoing COVID-19 pandemic. (Xinhua)

People look at zebras at the Los Angeles Zoo in Los Angeles, the United States, on Aug. 26, 2020. The Los Angeles Zoo reopened to the public on Wednesday with health precautions in place after being closed for 166 days due to the ongoing COVID-19 pandemic. (Xinhua)

People look at zebras at the Los Angeles Zoo in Los Angeles, the United States, on Aug. 26, 2020. The Los Angeles Zoo reopened to the public on Wednesday with health precautions in place after being closed for 166 days due to the ongoing COVID-19 pandemic. (Xinhua)