List of mammals of Great Britain

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Part of a series on the
Wildlife of Great Britain
Fauna England Cornwall Isles of Scilly Scotland Highlands Outer Hebrides Wales Endemic Extinct
Invertebrates Insects Ants Aquatic heteropteran bugs Bees Beetles Butterflies Conopid flies Damselflies and dragonflies Hoverflies Mayflies Moths Orthoptera and allied insects Shield bugs Soldierflies and allies Wasps Molluscs Non-marine molluscs Crustaceans Crabs Woodlice
Vertebrates Amphibians Fish Mammals Reptiles Birds British avifauna Wales Non-natives North American landbirds Feral parakeets Bee-eaters Cranes
Flora Ferns and allies Conifers Dicotyledons (Superrosids Asteraceae Rosaceae) Monocotyledons British National Vegetation Classification
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This is a list of mammals of Great Britain. The diversity of mammal fauna of Great Britain is somewhat impoverished compared to that of Continental Europe, due to the short period of time between the last ice age and the flooding of the land bridge between Great Britain and the rest of Europe. Only those land species which crossed before the creation of the English Channel and those introduced by humans exist in Great Britain.

Native (usually synonymous with "indigenous") species are considered to be species which are today present in the region in question, and have been continuously present in that region since a certain period of time. When applied to Great Britain, three possible definitions of this time constraint are:

• a species that colonised the islands during the glacial retreat at the end of the last ice age (c. 9500 years ago);
• a species that was present when the English Channel was created (c. 8000 years ago); or,
• a species that was present in prehistory.

This list includes mammals from the small islands around Great Britain and the Channel Islands. There are no endemic mammal species in Great Britain, although four distinct subspecies of rodents have arisen on small islands.

The following tags are used to highlight the conservation status of each species' British population, as assessed by Natural England and The Mammal Society in a Regional Red List, following the criteria of the International Union for Conservation of Nature.