the Labours--Length
of Mated Life--A Much-married Bluebird--The Faithful
Canada Geese--Unmated Birds--Polygamy Among
Birds--The Outcast._

IV. THE MIGRATION OF BIRDS . . . . . . . . . . . . . . . . 61

_Moulting--Why Birds Migrate--The Gathering
Flocks--The Usual Movement--The Travelling Shore
Birds--The World's Migrating Champion--Perils of
Migration--Keeping Migration Records._

V. THE BIRDS IN WINTER . . . . . . . . . . . . . . . . . . 82

_A Good Time for Field Walks--The Downy's Winter
Quarters--Birds and the Night--The Food Question in
Winter--When the Food Supply Fails--Wild Fowl
Destroyed in the Oil Fields--Hunting Winter Birds._

VI. THE ECONOMIC VALUE OF BIRDS . . . . . . . . . . . . . . 101

_A Government Report--Plagues of Insects--Some
Useful Birds--The Question of the Weed Seeds--Dealing
with the Rodent Pests--The Terror That Flies by
Night--A Seldom Recognised Blessing._

VII. CIVILIZATION'S EFFECT ON THE BIRD SUPPLY . . . . . . . 120

_Number of Birds in the World--Number in the
Different States--Increase of Farm-land Species--Effect
of Forest Devastation--Commercializing Birds--Wild
Pigeon--Ivory-billed Woodpecker--Labrador
Duck--Great Auk--Eskimo Curlew._

VIII. THE TRAFFIC IN FEATHERS . . . . . . . . . . . . . . . . 140

_War on the Sea Swallows--What the Ladies Wore--The
Story of the Egrets--Amateur Feather
Hunters--Maribou--Pheasants--Numidie--Goura--Women's
Love for Feathers--Ostrich Feathers Are Desirable._

IX. BIRD-PROTECTIVE LAWS AND THEIR ENFORCEMENT . . . HOW
LAWS ARE MADE . . . . . . . . . . . . . . . . . . . . . 167

_Definition of Game--Audubon Laws--Game Law
Enforcement--Lacy Lava--Federal Migratory Bird
Law--History of Game Laws--The Theory of Shiras--Work
of the Bird Committee--Government Explanations--World's
Only Bird Treaty._

X. BIRD RESERVATIONS . . . . . . . . . . . . . . . . . . . 190

_First Federal Bird Reservation--Congressional
Sanction--Florida Reservations--Distant
Reservations--President Taft a Bird
Protectionist--Audubon Society Reservations--The
Corkscrew Rookery--Wardens Shot by Plume Hunters._

XI. MAKING BIRD SANCTUARIES . . . . . . . . . . . . . . . . 214