As the Arctic Ocean tidal waters ebb and flow through the Anderson River Delta, a second tide, a tide of light arrives to shine once more. At wintering grounds around the world the feathered masses of the Arctic begin to stir as the thrilling call of the north echoes in their blood. So towards the light, the third wave, this great feathered tide, arises to ride the wind north, north, ever north. Come to this special Arctic delta, astoundingly ice-free during the last ice age, and discover its secrets.