In the 20 years since their reintroduction, wolves have changed the number, behavior, and movement of Yellowstone's elk. Both the elk and the ecosystem have benefited. This 4-minute video from the National Science Foundation shows how wildlife biologists use collars to track elk as well as wolves. There's a lot of footage-even some from renowned wildlife videographer Bob Landis-of wolves being wolves in the wild. You will see how elk protect themselves from wolves and how much difficulty and danger a wolf faces just trying to eat.
I hope you enjoy the video and its images of wolves in the wild.