The call of an eagle, or almost any bird of prey, which is actually always that of a red-tailed hawk. https://www.npr.org/templates/story/story.php?storyId=156

The call of an eagle, or almost any bird of prey, which is actually always that of a red-tailed hawk. https://www.npr.org/templates/story/story.php?storyId=156187375 https://www.npr.org/templates/story/story.php?storyId=156187... https://www.youtube.com/watch?v=CEmYEQ78zS0 https://www.youtube.com/watch?v=CEmYEQ78zS0