Birds on the Brain

There are estimated to be up to a quarter of a million walruses living in the wilds of the Arctic, but because of their remote habitats scientists cannot be sure. While they do face a struggle for survival due to climate change and competition against humans for fish there is not enough information about their exact numbers to know whether their population is currently increasing or decreasing. Picture: Stephen Kazlowski / Barcroft Media (via Walruses up close: Steve Kazlowski photographs the giant Arctic mammals - Telegraph)