Endangered Sumatran rhino gives birth in Indonesia

In this Thursday, May 12, 2016 photo released by International Rhino Foundation (IRF), Ratu, a 14-year-old Sumatran rhinoceros, sits next to its newborn calf at Sumatran Rhino Sanctuary in Way Kambas National Park, Indonesia. Ratu has given birth at the sanctuary in a success for efforts to save the critically endangered species. (Stephen Belcher/Canon/IRF/YABI via AP) MANDATORY CREDIT (The Associated Press)

In this Thursday, May 12, 2016 photo released by International Rhino Foundation (IRF), a newly born Sumatran rhinoceros calf walks at the Sumatran Rhino Sanctuary in Way Kambas National Park, Indonesia. Ratu, a 14-year-old Sumatran rhinoceros has given birth to the calf at the sanctuary in a success for efforts to save the critically endangered species. (Stephen Belcher/Canon/IRF/YABI via AP) MANDATORY CREDIT (The Associated Press)

A Sumatran rhinoceros has given birth at an Indonesian sanctuary in a success for efforts to save the critically endangered species.

The International Rhino Foundation said the female calf was born on Thursday, weighs about 45 pounds (20 kilograms) and looks healthy and active.

Only an estimated 100 Sumatran rhinos remain, mostly on the island of Sumatra, and nine are in captivity.

The species was rediscovered in the Indonesian part of Borneo through their trails and footprints in 2013.

But one member of that small population on Borneo died in April after a wound from a poacher's trap became infected.

The calf is the second to its mother Ratu, who gave birth to a male named Andatu in 2012.