The polar bears may be enjoying the frosty weather sweeping Europe, but the other animals at Belgrade Zoo are thankful for some extra heating.
Snakes escaped the bitter cold by sun-baking under heat lamps, while the zoo's monkeys watched the falling snow from the comfort of their heated enclosure.
Outside, zoo keepers were forced to break the ice.
The seals happily splashed about in the freezing waters, while the resident lioness made the most of the chilly weather, making snowballs.
