Introduction 1
1．Skeleton of a Flying Bird 3
2．Surface Characteristics Explained 7
3．The Feathers 11
4．Construction of the Leg 16
5．Wing＇s Structure and Function 20
6．Digestive System 23
7．Excretory System 45
8．Reprodnctive System 48
9．Respiratory System 55
10．Cardio-vascular System 63
11．The Blood and Lymph 69
12．The Ductless Glands 73
13．Nervous System 79
14．Eyes and Vision 84
15．Ears and Hearing 93
16．Syrinx and Voice Production 98
17．The Muscular System 102
18．The Egg 105
19．Incubation Periods 118
20．Development of the Chick 122
Works of Reference 126
Index 127
The Skull 4
Flying Bird＇s Skeleton 5
The＂Points＂of a Flying Bird 9
Down Tracts of Nestling Bird 12
Typical Adult Feather 13
The Left Hip-bone 17
Feet of Perching Birds 18
The Wing 21
Five Bills and Their Adaptations 25
Mouth and Pharynx 27
Esophagus,Crop,Stomach,etc 29
The Gizzard 32
The Intestines 35
The Cloaca 38
Position of Liver and Pancreas 41
Excretory System 46
Female Reproductive System 49
Male Sex Glands 51
Inner Parts of the Lung 56
The Air-sacs 60
The Heart 64
Main Blood-vessels into and out of the Heart 67
Interrelationship of Ductless Glands 76
Side Viewof Duck＇s Brain 81
Section Through Eye of a Bird 84
Four Foreas of a Hawk 88
Bittern Adopting a＂Freezing Posture＂ 88
Auditory Organ of an Owl 95
Section of Pigeon＇s Cochlea 96
Vocal Organs of a Canary 99
Fore and Hind Limb Muscles of a Fowl 104
Structure of an Egg 113
Five Shapes of Eggs 116
Structure of the Blastodisc 122
Surface View of Chick Embryo 123
The Embryonic Membranes 125