Seven Worlds, One Planet BBC Wildlife December 2019SEVEN WORLDS | ONE PLANET
24NORTH AMERICA
From the northern tundra to the
southern swamps, wildlife here has to
cope with intense seasonal change
and extreme weather events.
A female polar bear leads
her two cubs through a
patch of colourful fireweed.
During summer, with no
sea-ice to hunt on, polar
bears in this area are
restricted to the shores
of Hudson Bay, Canada.