Wolverine = wolverine (Gulo gulo)
Badger = European badger (Meles meles)
Sea Otter = sea otter (Enhydra lutris)
Otter = Eurasian otter (Lutra lutra)

Johnson's household book of nature, containing full and interesting descriptions of the animal kingdom, based upon the writings of the eminent naturalists, Audubon, Wallace, Brehm, Wood and others.
Date 1880
Source http://www.flickr.com/photos/biodivlibrary/7268644806
Author Hugh Craig, ed.
Source: https://commons.wikimedia.org/wiki/File:Johnson%27s_household_book_of_nature_(Plate_XX)_(7268644806).jpg

The wolverine (Gulo gulo), also referred to as the glutton, carcajou, skunk bear, or quickhatch, is the largest land-dwelling species of the family Mustelidae. The wolverine is found in northern Canada, Alaska, Nordic countries of Europe, and throughout western Russia and Siberia.

The European badger or Eurasian badger (Meles meles) is a species of badger in the family Mustelidae and is native to almost all of Europe and some parts of West Asia.

The sea otter (Enhydra lutris) is a marine mammal native to the coasts of the northern and eastern North Pacific Ocean.

The Eurasian otter (Lutra lutra), also known as the European otter, Eurasian river otter, common otter, and Old World otter, is a semiaquatic mammal native to Eurasia.