Mammals of the British Isles exist everywhere; on land, in rivers and lakes, in the air and in the sea. However, their nocturnal and elusive behaviour makes them notoriously hard to find and even more intriguing!

This section has factsheets on most of the species found on the British Isles, as well as fact sheets on problems associated with mammals. If you want a species that is not yet online, please email This e-mail address is being protected from spambots. You need JavaScript enabled to view it

We have:

- A list of all the mammal species found in and around the British Isles.

- A history of British mammal fauna by Society president Derek Yalden.

- Mammal factsheets by species describing their ecology, biology and conservation status.

- Factsheets on the problems associated with some species and how to deal with them

- An A-Z list of other websites related to mammals and conservation

Alternatively, our Mammals of the British Isles Handbook is the definitive guide to the biology and ecology of every mammal found on the British Isles. It contains 800 pages of up-to-date information, supported by excellently illustrated plates, photos maps and diagrams. You can purchase our Handbook from our online Shop.