This is a list mammals of Great Britain. The Great Britain mammal fauna 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. Great Britain holds a small (Scottish) population of European Wildcats, important populations of Grey Seals, and rare bat species. (usually synonymous with "indigenous") species a...

The List of mammals of Colorado lists every wild mammal species seen in the U.S. state of Colorado, based on the list published by the Colorado Division of Wildlife . It does not include species found only in captivity. Species in this list are grouped by order and then by family within each order. The common name for each species is followed by its binomial name. The following codes are used to denote certain categories of species: *EN - Species is listed as endangered by the IUCN. *NT - Species is listed as near threatened by the IUCN. *EX - Species has been extirpated from Colorado, ...