Wolves are important predators within the ecosystems where they live. As predators, they influence the animals they hunt and interact with other species that share the same environment. Their role extends beyond simply removing prey from the food web.

Wolves primarily prey on ungulates and other mammals, depending on what is available in their environment. Their feeding behavior can influence prey populations and the way prey animals use their surroundings.

Wolf kills also become resources for other animals. Once wolves leave a carcass or while they are feeding, scavengers such as ravens, magpies, and other animals can make use of the remaining food. In Yellowstone, researchers have documented wolf kills benefiting a variety of scavenging species.

A carcass can support an entire community of organisms. In Yellowstone, researchers have found numerous species of beetles associated with large ungulate carcasses, along with flies, fungi, and other organisms involved in consuming and decomposing what remains.

Wolves can also influence other predators. Research in Yellowstone has found that coyotes may alter their behavior in areas occupied by wolves, demonstrating that interactions between predators can affect how animals use the landscape.

The effects of wolves can sometimes extend beyond predators and prey through what scientists call a trophic cascade. A trophic cascade occurs when changes involving predators create effects at other levels of a food web. For example, wolves can influence elk abundance or behavior, which can in turn affect how heavily elk browse on vegetation.

Yellowstone provides an important example of this complex relationship. Studies have found that wolves have contributed to changes in elk numbers and behavior since their reintroduction, while scientists continue to study how those changes affect vegetation and other parts of the ecosystem.

It is important to understand that wolves are one part of a much larger system. Weather, fire, plant growth, disease, human activity, other predators, prey abundance, and many other factors also influence ecosystems. Scientists continue to investigate exactly how these factors interact.

By hunting prey, providing food for scavengers, interacting with other predators, and influencing food-web relationships, wolves help connect many different parts of their environment.

Their ecological importance is therefore not simply about the number of animals they kill. Wolves are part of a complex web of predation, competition, scavenging, decomposition, and nutrient cycling that links animals, plants, and the landscape together.

And I deliberately kept the Yellowstone section careful rather than repeating the oversimplified “wolves changed everything” story. The NPS itself notes that the ecosystem is complex and that the extent of some proposed trophic cascades remains an area of scientific study.