A polar bear in Alaska has died of avian influenza, the first known case in a mammal.
It has prompted an official in Alberta to caution that the same could happen in Canada’s north.
Alaskan officials believe the polar bear ate a bird that was infected.
Migrating waterfowl have been spreading the highly-pathogenic avian influenza across Canada, the United States and Europe, prompting poultry farmers to cope with flock depopulations and quarantine zones to prevent it from spreading further.
