Water is essential to life and a whole host of species require water for more than to quench their thirst. From providing species such as freshwater invertebrates and amphibians with breeding grounds and shelter, to a welcome way for birds to bathe and rid their pesky parasites, to acting as areas where insects congregate, which in turn feed species such as bats, to providing muddy surfaces of which butterflies obtain minerals. Having water sources in your garden is one of the best things you can do for wildlife.
Whether it be by leaving dishes of water out, or going bigger scale and creating ponds to provide water, they come as a welcome relief to hedgehogs who will be sure to be thirsty on their 2km- 3km nightly travels in the summer.