She had taken up residence near a fishing plant on the Kolyma River, where locals fed her on throwaway fish. Picture: Ministry of Nature Protection of Yakutia

The wandering polar bear is estimated at being only nine months old, which makes her adventure all the more extraordinary.

As we reported earlier, the animal - known to come as Umka but now likely to be renamed - had strayed out of the ice shores of the Arctic Ocean, and headed some 700 kilometres south.

She had taken up residence near a fishing plant on the Kolyma River, where locals fed her on throwaway fish.

Earlier it was thought the bear might be aged up to two but she is younger.

'The cub is not afraid of people, since the fishermen who found the bear fed her with fish.' Picture: Ministry of Nature Protection of Yakutia

Experts presume she lost her mother for unknown reasons but are genuinely puzzled how she came to be so far away from her natural territory.

The rescue team was headed by the head of the Central Kolyma Inspectorate for Nature Protection, Ivan Belonogov, who said she would now go to Yakutsk zoo Orto Doidu.

She is too young to be released alone into the wild, and has now had too much contact with people to survive, yet this only adds to the mystery of how she came this far south.

The bear was tranquillised before being transported in a cage initially by river to Srednekolymsk. Pictures: Ministry of Nature Protection of Yakutia

'The cub is not afraid of people, since the fishermen who found the bear fed her with fish,' he said.

'For now the condition of the cub is satisfactory, her appetite is good.'

The bear was tranquillised before being transported in a cage initially by river to Srednekolymsk.

Earlier it was thought the bear might be aged up to two but she is younger. Pictures: Ministry of Nature Protection of Yakutia, Ykt.ru

The rescue was carried out by Nature Protection Inspectorate, the Kolyma Nature Park, the Republican Zoo Orto Doidu, and the Directorate of Biological Resources and the Protected Areas of the Ministry of Natural Resources of Yakutia.

One theory is that her mother was killed by poachers and they took the orphaned cub live with them south from the Arctic coast, releasing her when she got too large.

But there is no evidence for the fate of the mother.