Ducks, Geese and Swans of North America

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The existing literature on the identification of waterfowl describes mainly their spring plumages. This is of little avail to the sportsman who is afield mainly in the fall, and it hardly suffices for the ornitholog...