Distribution and Migration of North American Ducks, Geese, and Swans (U.S. Department of Agriculture. Division of Biological Survey--Bulletin N. 26)

90 pp. Red cloth boards. CONTENTS: Introduction; Protection; Causes of Decrease in Numbers of Waterfowl; Winter Ranges: Speices That Winter Principally in the United States and Southward - Species That Winter in the United States and Canada; General Remarks on Migration; Tables of Distribution: Species Occurring in Central America, West Indies, or Mexico, but Not Known to Reach the United States - European Species Occurring in North America as Stragglers - Species That Breed and Winter North of the United States - Species That Breed Chiefly North of the United States - Species That Breed Chiefly North of the Arctic Circle, with the Northernmost Latitude at Which the Species Has Been Observed in the Western Hemipshere - Southern Species, with Nothern Limit of Breeding Range - Western Species, with Eastern Limit of Regular Range - Southern Limits of Species Whose Winter Range Extends South of the United States; Summary; Distribution and Migration of Ducks; Distribution and Migration of Geese; Distribution and Migration of Swans; Index.