by Brooklyn Miller, age 12
Pumas are elusive wild cats, who can easily adapt to a variety of different climates, ecosystems, and prey. While these pumas are located in Patagonia, a region found in South America, pumas can be found generally around South America. However, the behavior of these Patagonian pumas seemed unusual, leading the scientists to conduct further research.
The Patagonian pumas used to be native animals until they were forced out by sheep ranchers in the 20th century. In the pumas’ absence, animals had adapted to the new reduced hunting pressure, specifically a group of Magellanic penguins who, in normal conditions, were usually confined to offshore islands, had established a mainland breeding colony with roughly 40,000 breeding pairs. However, after Monte Leon National Park was established in 2004, the pumas had already started to steadily make their way back. That is when researchers started noticing penguin remains in the pumas’ waste. Researchers dismissively thought it was only a few pumas continuing to eat the penguins, until they noticed that there were many puma sightings near the penguin colony.
The issue is that these pumas, usually solitary cats, had changed their behavior. They were living closer together, tolerating each other more, and having far more social interactions. The pumas mainly hunted these penguins as they were easy prey in breeding season, and even more so with their widening range. The fact that the penguins had only moved offshore when it was breeding season may suggest that the pumas’ descendants had hunted those penguins, so why have their interactions changed now? [Read More]