The small black African wasps brought to Hawaii to fight invasive gall wasps were successfully protecting the state’s wiliwili trees, but the reintroduction of wolves to Yellowstone National Park had failed to stop elk from eating quaking aspens, disappointing scientists who had hoped that the wolves could do so by creating a “landscape of fear.”
The small black African wasps brought to Hawaii to fight invasive gall wasps were successfully protecting the state’s wiliwili trees, but the reintroduction of wolves to Yellowstone National Park had failed to stop elk from eating quaking aspens, disappointing scientists who had hoped that the wolves could do so by creating a “landscape of fear.”