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Facts and figures

Learn more about the mammals that roam Britain by browsing our fact files via the links below.

Estimates of population sizes are taken from the Mammal Society’s 2018  report, ‘A Review of the Population and Conservation Status of British Mammals: Technical Summary’. There are eleven mammal species (either native or naturalised) that are at risk of extinction in Britain as assessed by IUCN Red List criteria. These are classified as: Critically Endangered (CR), Endangered (EN), or Vulnerable (VU), with those Critically Endangered being at highest risk, and collectively are referred to as Threatened. Four others are classified as Near Threatened (NT).

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