Patagonia supports one of South America's highest puma densities, particularly in the Andes and pre-Andes zones. Puma-livestock conflict with sheep and cattle ranchers drives significant retaliatory killing. Welfare interventions include livestock guarding dogs (LGDs) deployed to reduce predation, remote camera monitoring of puma territories, and payment-for-predator-coexistence programs paying ranchers to tolerate pumas on their land.
Conservation organizations including WCS (Wildlife Conservation Society), Panthera, and Rewilding Argentina work on puma-rancher coexistence. The Torres del Paine National Park (Chile) and Los Glaciares (Argentina) provide protected habitat, though pumas regularly move outside park boundaries.
Guanacos — wild camelids and primary prey species for pumas — once numbered in the tens of millions across Patagonia. Overgrazing by sheep, fencing of ranches, and hunting reduced populations to an estimated 600,000-2,000,000. Welfare concerns include population fragmentation creating genetic bottlenecks and the welfare of individual animals suffering from malnutrition during drought years when competition with sheep is intensified.
Argentina's Punta Tombo hosts the world's largest Magellanic penguin colony, with 500,000+ individuals. Welfare concerns include: oil pollution from tanker routes affecting bird health; plastic pollution in feeding areas; climate-driven shifts in anchovy prey distribution increasing chick starvation; and tourism disturbance to breeding colonies. The Wildlife Conservation Society monitors penguin health and welfare indicators at Punta Tombo annually.
Peninsula Valdés (Argentina UNESCO World Heritage Site) is the primary nursery area for the South Atlantic southern right whale population. Population recovery from whaling has been strong but recent years have seen unusual mortality events, particularly among calves. Investigation has implicated kelp gulls that have learned to feed on whale skin and blubber — an extraordinary welfare problem unique to Valdés where gulls have developed this feeding behavior not seen elsewhere. Management of gull behavior and population is ongoing.
Rewilding Argentina and the Tompkins Conservation (now Fundación Rewilding Argentina) have conducted large-scale rewilding projects in Iberá Wetlands and Patagonia, reintroducing jaguars, giant anteaters, pampas deer, tapirs, and collared peccaries. These programs consider animal welfare in reintroduction design — selecting animals with appropriate behavioral repertoires and providing post-release monitoring and intervention.