Lovely piece by Hedgehog Street's Henry Johnson on the many reasons why we should save our dwindling hedgehog population. The reason listed which leaps out at me is that hedgehogs play a vital part in our ecosystem. I hear numerous complaints from gardeners about the amount of slugs eating their plants, but many choose to use slug pellets which are extremely harmful to hedgehogs rather than encourage hedgehogs by joining up gardens and creating diverse habitats.
7. Hedgehogs outlived the sabre-toothed tiger. (The ancestors of the modern hedgehog evolved around 20 million years ago, when wooly mammoths and sabre-toothed tigers bounced around.)