Patagonian weasel not been thoroughly studied in the wild, and knowledge of its behavioral patterns is unsure. It reportedly has been kept as a working pet by local ranchers to destroy rodents. Patagonian weasel The Patagonian weasel ("Lyncodon patagonicus") is a small mustelid that is the only member of the genus "Lyncodon". Its geographic range is the Pampas of western Argentina and sections of Chile. An early mention of the animal is in the Journal of Syms Covington, who sailed with Charles Darwin on his epic voyage aboard "HMS Beagle". The Patagonian weasel has a head and body length of , with
Patagonian grasslands The region holds very diverse fauna. Mammals include Patagonian mara ("Dolichotis patagonum"), southern viscacha ("Lagidium viscacia"), Wolffsohn's viscacha ("Lagidium wolffsohni"), Patagonian weasel ("Lyncodon patagonicus"), Humboldt's hog-nosed skunk ("Conepatus humboldtii"), cougar ("Puma concolor"), Falkland Islands wolf ("Dusicyon australis") and guanaco ("Lama guanicoe"). Threatened species include Patagonian mara ("Dolichotis patagonum"), guanaco, South American gray fox ("Lycalopex griseus") and South American fur seal ("Arctocephalus australis"). Bird include Darwin's rhea ("Rhea pennata"), Patagonian tinamou ("Tinamotis ingoufi"), black-chested buzzard-eagle ("Geranoaetus melanoleucus"), peregrine falcon ("Falco peregrinus"), band-winged nightjar ("Systellura longirostris"), Patagonian mockingbird ("Mimus patagonicus") and Patagonian yellow finch ("Sicalis lebruni"). Endemic birds found north of the