This handout still image photo taken from video footage on May 22, 2020 and released by the Environment and Forestry Ministry shows a male Javan rhinoceros calve named Luther (left) in Ujung Kulon national park in Indonesia?s Banten province. - Two extremely rare Javan rhinoceros calves have been spotted in an Indonesian national park, boosting hopes for the future of one of the world's most endangered mammals. - AFP file pic
This handout still image photo taken from video footage on May 22, 2020 and released by the Environment and Forestry Ministry shows a male Javan rhinoceros calve named Luther (left) in Ujung Kulon national park in Indonesia?s Banten province. - Two extremely rare Javan rhinoceros calves have been spotted in an Indonesian national park, boosting hopes for the future of one of the world's most endangered mammals. - AFP file pic

JAKARTA: A new Javan rhinoceros calf has been spotted at an Indonesian national park, giving hope for the conservation of one of the world's most endangered mammals.

The calf, estimated to be between 3 and 5 months old, was spotted in footage captured last month by one of 126 camera traps installed in Ujung Kulon National Park on Java island.

The mammal, whose sex remains unknown, was seen walking with its mother inside the park, the last remaining wild habitat for Javan rhinos.

"Praise God, this is good news and proves that Javan rhinos, which only exist in Ujung Kulon, can breed properly," senior Environment Ministry official Satyawan Pudyatmoko said on Saturday.

After years of population decline, authorities believe there are 82 rare rhinos inside the around 120,000ha sanctuary of lush rainforest and freshwater streams.

Javan rhinos have folds of loose skin giving them the appearance of wearing armour plating.

They once numbered in the thousands across Southeast Asia, but have been hard hit by rampant poaching and human encroachment on their habitats.