Pelicans rest on a rock in the lake in St James’s Park, London, during last week’s cold snap across the UK. The lake would have been frozen over if not for the fountain. Six great white pelicans live in the park and are free to come and go as they please Photograph: Vuk Valcic/Sopa Images/Rex/Shutterstock A swan also looks a bit perplexed at a frozen lake in Kidderminster, UK Photograph: Lee Hudson/Alamy Live News Emperor penguins form an orderly queue as breeding season begins in Antarctica Photograph: WWF Lexi, a Syrian brown bear, preparing for her first hibernation in the