The Yellowstone wolf project has been a valuable experiment to help biologists decide whether to reintroduce wolves to other parts of the country as well.

黄石国家公园狼计划是一项有价值的实验，有助于生物学家决定是否将狼重新引入美国其他地区。

youdao

In Greater Yellowstone, for example, Predator Project found that more than two-thirds (22 out of 30) of the human-caused mortalities of the Yellowstone wolves have occurred outside of the national park, even though the wolves have spent the majority of their lives within the park's borders.

CNN: Northern Rockies wolf report released

Predator Project found that wolves rarely survive outside of the three core recovery areas: Yellowstone National Park, central Idaho and Northwest Montana.

CNN: Northern Rockies wolf report released