Flying south in the fall and north in the spring, waterfowl have followed travel routes in the sky for centuries. These migrations are repeated year after year as ducks, geese, and swans pass from one region to another, to breeding or wintering grounds. Wildlife biologists call these migration corridors flyways, and each flyway - Atlantic, Mississippi, Central, and Pacific - is as varied as the birds that inhabit them.

Former waterfowl biologist and award winning wildlife photographer Gary Kramer takes readers on a photographic journey across North America, from the Atlantic to the Pacific and from the tundra to the tropics, following the ebb and flow of waterfowl and other wildlife as they travel along these ancestral travel routes. Stunning photographs and inspired text provoke admiration and awe for the beauty and complexity of North America’s waterfowl and the wetlands they call home.'