Each spring, hundreds of thousands of shorebirds stop to rest and feed along the Washington Coast and in the Grays Harbor estuary during their migration northward. Coming from as far south as Argentina, these Arctic-bound shorebirds are among the world's greatest migrants. Some birds travel over 15,000 miles round trip! The concentration of birds during spring migration offers people a great chance to view a number of shorebird species. With luck you will also see the birds fly together in beautiful formation "murmurations" while trying to escape a Peregrine Falcon.