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.

Credits: Alex Montacute

ANNUAL CONFERENCE 2025 TICKETS NOW AVAILABLE

ANNUAL CONFERENCE 2025 TICKETS NOW AVAILABLE

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Discover British mammal species

With approximately 90 species spanning across land, air, and sea, there are many fascinating creatures to learn about. From iconic land-dwellers like red foxes and badgers to majestic marine mammals like seals and dolphins, the British Isles are home to a rich tapestry of mammals.

Credits: Shane Stanbridge

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Become a Youth Ambassador

Our Ambassador Programme is your gateway to the world of mammal conservation.

Join the Local Groups Network

A growing movement of mammal enthusiasts across Britain.

From the world of mammal conservation

Stay informed about the latest mammal news, tips and events in our newsletter.

Discover the Local Groups Network

Our local groups support a growing movement of mammal enthusiasts across the British Isles and Ireland. Discover a group near you and join alongside like-minded individuals who are dedicated to safeguarding mammals.

Buy Crap Calendar 2025

Get our A4 full-colour wall calendar that lets you pan what you do with mammal poo.

Submit your work

Enter the Mammal Photographer and Illustrator of the Year 2025 competition.

Buy gift membership

Membership of the Mammal Society is a wonderful gift for nature enthusiasts of all ages.