Wolves were reintroduced to Yellowstone 25 years ago, after intense debate and under serious scrutiny. Park rangers exterminated the last wolves in Yellowstone nearly a century ago, and their return has restored the park's ecosystem to a state not seen in a long time.
It is unusual to find a snowy owl in Wyoming because they breed in the arctic tundra and usually spend their entire lives there, but Dr. Charles Preston, the former curator of the Draper Natural History Museum, said these owls are known to erupt.
Before the expansion of the West, there was an estimate of almost 600 million beavers throughout North America. But in the early 1800s, when unregulated harvesting of beaver pelts began, the beaver almost went extinct within a 40-year period.
Between 1995 and 1997, 41 wolves from Canada and Northwest Montana were reintroduced to Yellowstone National Park. Twenty years has passed and the population has grown close to 400 in the Greater Yellowstone Ecosystem.