Sumatran elephant calf born at Indonesia's national park

A 41-year-old Sumatran elephant, Lisa, has given birth to her fifth child at Tesso Nilo National Park in Riau province of Indonesia. According to authorities, Lisa gave birth to a female calf on Thursday early morning. According to the World Wildlife Fund, Sumatran elephants are on the brink of extinction with only about 2,400-2,800 left in the world.