This is particularly noticeable in autumn on the Great Lakes, when up to 18,000 birds may pass Whitefish Point on Lake Superior; these are thought to be Canadian breeders heading for the Atlantic Ocean to winter.
bird | Bird of prey | West Point | Important Bird Area | West Point, New York | Royal Observatory, Greenwich | Hot Bird | Free Bird | observatory | Big Bird | Royal Observatory | Paris Observatory | Larry Bird | whitefish | Palomar Observatory | High Point, North Carolina | bird of prey | George Bird Grinnell | Yerkes Observatory | bird migration | Arecibo Observatory | Siding Spring Observatory | Mount Wilson Observatory | Bird migration | Stevens Point | Smithsonian Astrophysical Observatory | Point Break | Observatory | High Point | Harvard College Observatory |