One in four UK mammals are threatened with extinction. The British Isles and Ireland are home to many species of mammal, from the common shrew to grey seal. We work toward a future where populations thrive as part of healthy and diverse ecosystems benefiting people and nature. - Keeping a constant watch on the conservation status of our mammals and making this information freely available. - Making conservation more effective by providing guidance on what to do and where to do it. - Educating the public and professionals about wild mammals, training people to survey them, and sharing the latest research. - Working in partnership to restore native mammal populations and re-establish functional ecosystems.