Without their mother, bear cubs Bradley and Cooper train for the wild

Just four months old, bear cubs Bradley and Cooper are still bottle-fed but they will soon have to forage into the Greek forest if they are to eat on their own.

The pair of orphaned cubs, rescued by the Arcturos sanctuary in northern Greece, will be trained to survive in the wild - and anything else their mother would have taught them.

"We teach them what they need to know; where to find food, what they should eat, how they will make their nest in the winter," said Melina Avgerinou, caretaker at Arcturos, which saves orphaned or captive bears and seeks to reintegrate them into their environment.

"According to the season, we try to teach them what their mother would have taught them in nature," she said.

The cubs were found by a local in the village of Kozani about an hour away, and because they were kept in a sheep pen for a week, it was too late to...