Fall is a time of great migrations — three-quarters of all of Canada’s bird species fly south. On the vast tidal flats of the world-famous Bay of Fundy, massive flocks of semipalmated sandpipers feast and gather strength for their epic journey south. The world’s biggest tides provide an all-you-can-eat buffet for the hungry travellers, but as the waters rise, the resting hordes become targets for swift and powerful hunters: peregrine falcons. The sandpipers rise up in swirling, ever-shifting giant flocks that confuse the falcons. But the falcons have a hunting strategy that rarely fails.