Predator stories are often presented as a single chain of cause and effect. A careful account asks what other changes happened at the same time.
Understand the context
The US National Park Service describes Yellowstone wolves as predators living in social groups. Food left from their prey is used by other animals. Its ecosystem discussion also considers hunting, drought and other influences on herbivores; attributing every change to one species loses this complexity.
Try a learning activity
- Draw a network linking predators, prey, plants and scavengers.
- Add drought and human activities as separate influences.
- Mark a link that needs evidence before it becomes a claim.
- Write a caption that distinguishes observation from explanation.
Reflect on the evidence
Compare your record with the source. Which details did you observe directly, which did you learn from the reading, and which remain uncertain? Keep those answers separate. Add the place, date and method when they are known; a short observation or a single photograph does not describe an entire landscape.
Reading source: NPS — Wolf Ecology and Ecosystem Processes · Additional reading.
Learning activity prepared by Living Heritage. Source review date retained from the original editorial record: 29 September 2026. This activity is an educational exercise, not a scientific survey or a field intervention plan.