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American mink

Semiaquatic species of mustelid

  • 24 min read
  • 10 chapters
An American Mink in Capisic Pond, Portland, ME.
Needsmoreritalin · CC BY-SA 3.0

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Through Carnivore, Invasive species and Fossil

Evolution

As a species, the American mink represents a more specialized form than the European mink in the direction of carnivory, as indicated by the more developed structure of the skull. Fossil records of the American mink go back as far as the Irvingtonian, though the species is uncommon among Pleistocene animals. Its fossil range corresponds with the species' current natural range. The American minks of the Pleistocene did not differ much in size or morphology from modern populations, though a slight trend toward increased size is apparent from the Irvingtonian through to the Illinoian and Wisconsinan periods.

Although superficially similar to the European mink, studies indicate the European mink's closest relative is the Siberian weasel (kolonok) of Asia. The American mink has been recorded to hybridize with European minks and polecats in captivity, though the hybrid embryos of the American and European minks are usually reabsorbed.

Subspecies

As of 2005, 15 subspecies are recognised:

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