Scientists have tagged eight walruses

The whereabouts of the walruses have been plotted on the map below using data received from the Danish-Greenlandic research team.

MIGRATION MAP Walrus 1: Male, 4-5 years Walrus 2: Female, 10-12 years - has yearling calf in tow Walrus 3: Anomalous data point Walrus 4: Male, 5-6 years Walrus 5: Male, 18-20 years Walrus 6: Female, 5-6 years Walrus 7: Male, 5-7 years (No data received from a tagged female and her son) At a glance: Walrus tracking

HOW THE PROJECT WORKS

• Researchers attached eight satellite tags to walruses in west Greenland

• The satellite tags transmit location coordinates to the scientists via the Argos satellite system

• Data appears on this map, linked to from our stories, showing the animals' progress
• Walrus 2's transmitter functioned for several months, revealing the beast's summer migration