Sanguinario is a mythical jaguar that prowls El Este. Hunt it for its pelt, which you trade for unique gear at the Hunting Lodge in your guerrilla camp.
Sanguinario lives in El Este. Buy its brochure first so the den is marked on your map.
Fight it like a cougar that won't go down. Keep moving so its pounces miss, stay on open ground where you can see it coming, and use your heaviest weapon. Fire and explosives are fine.
Its pelt for unique gear at the Hunting Lodge, plus meat that trades for Industrial Circuits.
Mamutito
Mamutito is a giant mythical hog that lives on Isla Santuario, in Mamutito's Glen. Hunt it for its tusks, which you trade for unique gear at the Hunting Lodge in your guerrilla camp.
Perros Demoníacos
The Perros Demoníacos are a pair of mythical coyotes, one black and one white, that roam Madrugada. Hunt both and trade their pelts for unique gear at the Hunting Lodge in your guerrilla camp.
Venodiente
Venodiente is a glowing, mutated crocodile in Valle De Oro that escaped a crocodile reserve after exposure to a chemical dump. It shrugs off bullets but burns well, and its leather trades for unique gear.