The recovery of puma populations in Monte Leon National Park, Argentina, has led to increased predation on Magellanic penguins, resulting in a conservation dilemma. A study estimates over 7,000 adult penguins were killed by pumas between 2007 and 2010, highlighting the issue of surplus killing. While pumas alone are unlikely to drive the penguin colony to extinction, factors like reproductive success and juvenile survival are critical for their future. The study emphasizes the need to understand how environmental changes affect penguin populations.