Hedgehogs have been listed as "near threatened" on the International Union for Conservation of Nature's red list, with a decline in numbers of at least 30% over the past decade. Urban development, intensive farming, and roads are major factors contributing to their population decline. The Mammal Society is calling for people to garden in a wildlife-friendly way to help halt the decline. One in four UK mammal species are threatened with extinction.

Source: https://www.theguardian.com/environment/2024/oct/28/hedgehogs-near-threatened-red-list-decline-over-past-decade