Walrus tracking comes to an end

A project to find out where walruses spend their summer is over after the last tracking device stopped working.

Originally eight of the huge animals were tagged by scientists so they could be followed when they left Greenland.

Most of the devices stopped working early on, apart from one transmitter which showed a walrus swimming hundreds of kilometres all the way to Canada.

The female walrus is about 10-12 and is travelling with her year-old baby. Her tag stopped working on 18 August.

Cool facts about walruses

On Newsround's Walrus Watch Map, she is called Walrus Two.

Erik Born, the scientist in charge of the walrus study, said he was pleased that one of the animals had showed where it could go.

Walrus tracking See the map here

But he said that he would need to see where more walruses swum to, to work out if all of west Greenland's walruses spent their summer in this part of Canada.

To do this, he plans to put more tags on the big beasts next year.

As well as trying to solve the mystery of walrus migration, the scientists are also using the Walrus Watch map to work out how global warming is affecting the big beasts.

The scientists think that when the Earth heats up there will be less ice in Greenland and this might change where the walruses go.