Differences between its diet and that of the American mink are small. Diseases spread by the American mink can also account for the decline. Disease spread by the American mink can also account for the decline. Fur farm escapees such as coypu and American mink have extensive populations. Trapping is used to control or eliminate introduced American mink populations. Traps set for coyotes, American mink, and other animals may harm black-footed ferrets. The diets of the American mink and European otter overlap to a great extent. The European mink is similar to the American mink, but with several important differences. The American mink may pose a threat to poultry. The American mink relies heavily on sight when foraging. American mink are occasionally seen on the Witham. The American mink often carries light tick and flea infestations. The extinct sea mink is related to the American mink, but was much larger. The American mink was introduced and released in Europe during the 1920s-1930s. The American mink is a promiscuous animal that does not form pair bonds.