Learn important facts about six key Arctic species – the beluga, the walrus, narwhal, polar bear, Arctic tern and bowhead whale. Click images for larger versions/pdfs. Arctic species under threat 1: Beluga   Arctic species under threat 2: Narwhal   Arctic species under threat 3: Walrus   Arctic species under threat 4: Polar Bear   Arctic species under threat 5: Arctic Tern   Arctic species under threat 6: Bowhead Whale