#549 A mother and cub stop as they hear a sound. The mother bear keeps herself and her cub well away from the many male bears nearby.

#550 Only after the chunks of ice that accumulate near Churchill freeze solid can the waiting polar bears begin to move out onto the ice and hunt for seals, their primary food source. Here, a bear inspects the pack ice.

#555 A polar bear close to our tundra buggy takes a deep sniff to catch our scents - during a polar bear tour at Churchill, Manitoba, Canada, in October 2006.