巢鼬属（学名 Galictis）属于鼬科动物，包括两种巢鼬，即小巢鼬和大巢鼬。两者都分布在中南美洲地区。

巢鼬体长50厘米，体重1-3公斤。体型与水貂相似，但尾和腿较短，身体较健壮。巢鼬背部为银灰色，身体下部则为黑色。前额有一条白色的条纹。

巢鼬生活在南美大草原和低海拔的森林中，多在枯木与岩缝中挖穴栖居。食性较杂。

A grison, also known as a South American wolverine, is any mustelid in the genus Galictis. Native to Central and South America, the genus contains two extant species: the greater grison (Galictis vittata), which is found widely in South America, through Central America to southern Mexico; and the lesser grison (Galictis cuja), which is restricted to the southern half of South America. In Spanish it is referred to as a huroncito (literally "little ferret") or grisón and in Portuguese as a furão.