{{Animal sign
| latin_name =Mustelidae
| common_name =Weasels, minks, fishers, and otters
| animal_image =Mink-mustella-vison.jpg
| animal_caption = Mink (Mustela vison)
| image2=Otters in Wellington Zoo.jpg
| caption2 = Otters (Lutrinae)
| track_image =Martes.martes.tracks.on.snow.jpg
| track_caption = Pine Martin (Martes martes) tracks in snow
| scat_image =Excrementos de nutria.001.JPG
| scat_caption = Otter scat
| range = Worldwide
| description =
Mink
Their long slim body is covered in glossy, thick dark brown or black fur with a white patch under the chin. They have short legs with partially webbed feet, which make them excellent swimmers. They can be found in wooded areas and fields near streams and lakes. They dig burrows in river banks or take over dens abandoned by other animals. They feed on small mammals, fish, crayfish, frogs and other amphibians, also sometimes eating birds, insects and earthworms. These animals are mainly active at night and do not hibernate.
Otter
Otters have a dense layer (1,000 hairs/mm², 650,000 hairs per sq. in) of very soft underfur which, protected by their outer layer of long guard hairs, keeps them dry under water and traps a layer of air to keep them warm.
