The Arctic | National Wildlife Federation

The Arctic is a region of extremes: extreme cold, extreme seasonal changes in daylight, and extreme winds. It sits at the top of world, covered in sea ice—a seemingly unwelcome place for life. Yet the Arctic is actually teeming with wildlife, from large mammals like walruses and polar bears to birds, fish, small plants, and even tiny ocean …

https://www.nwf.org/Educational-Resources/Wildlife-Guide/Wild-Places/Arctic