Mustela rixosa, commonly known as the Brazilian weasel, is a species of weasel found in Brazil. This small carnivorous mammal is known for its agility and stealth, which it uses to hunt for prey. While "Mustela rixosa" is the scientific name for this particular species, there are many synonyms for it in the scientific literature. Some of the most commonly used synonyms for Mustela rixosa include Eira barbara, Eira rixosa, Eira trivirgata, and Pekania rixosa. These synonyms are used interchangeably to refer to the Brazilian weasel, emphasizing its status as a unique and fascinating animal that is highly valued by scientists and wildlife enthusiasts alike.