For bird watchers, spring migration is an annual highlight as birds arrive in huge numbers in their brightest courtship plumage. At Beaverhill Lake, one of North America's premier birding hotspots, John takes us on a tour of the countryside while watching for migrating shorebirds and raptors. The appearance of a hunting Peregrine Falcon, complete with a high-speed dive at a Northern Shoveller, makes the day.