CONTENTS. 



Page. 



IV. Western End of Rock Harbor and Trail to Sumner Lake 87 



1. Harbor. (Vicinity of Station III, Sub. 2) 88 



2. Small Islands (Station III, Sub. 1) 88 



3. Bulrush Zone and Delta (Station III, Sub. 3) 89 



4. Trail to Sumner Lake (Station III, Sub. 4) 89 



a. Birch Forest 89 



b. Birch and Coniferous Forest 89 



5. Sumner Lake (Station III, Sub. 5) 89 



V. Siskowit Lake Region 90 



1. Siskowit Bay and Shore (Station V, Sub. 1) 90 



2. Trail to Siskowit Lake (Station V, Sub. 4) 91 



3. Siskowit Lake (Station V, Sub. 6 and vicinity) 91 



4. Burning West of Outlet to Siskowit Lake (Station V, vicinity of Sub. 9). 92 



5. Long and Menagerie Islands (Station V, Sub. 10) 92 



VI, Summary 93 



1. Water Birds 93 



2. Shore Birds 94 



3. Birds Frequenting Swamps 94 



4. Birds of Clearings and Partial Clearings 95 



5. Birds Frequenting the Forests 95 



The Fall Migration of Birds at Washington Harbor, Isle Royale, Lake Superior, 



by Max Minor Feet 97 



I. Introduction 97 



II. The Environment 97 



1. The Clearing 97 



2. The Fol-est 98 



3. Food 99 



III. The Weather Conditions and Migrants 99 



1. Weather Conditions 99 



2. The Bird Migrants 100 



a. Warblers 100 



b. Sparrows 102 



c. Hawks 103 



d. Owls 104 



e.' Thrushes 104 



f. Other Birds 104 



IV. Large Bird Waves 105 



1. First Wave 106 



2. Second Wave 106 



3. Third Wave 107 



4. Fourth Wave 107 



5. Fifth Wave 109 



6. Sixth Wave 109 



V. The Relation of Weather to Migration 109 



1. Influence of Wind ' 110 



2. Influence of Temperature Ill 



3. Influence of Barometric Pressure Ill 



4. Condition of the Sky Ill 



5. Summary and Conclusion Ill 



VI. The Routes of Migration 112 



VII. The Perils of Migration 113 



1. Fatigue 113 



2. Natural Enemies 115 



3. Blunders and Fatalities 116 



The Ecological Succession of Birds, by Dr. Chas. C. Adams 121 



I. Introduction ' 121 



II. Representative Literature on Habitats and Succession 123 



1 . Habitat Preference 1 23 



2. Succession 126 



III. The Major Avian Environments 128 



IV. Minor Avian Environments and their Associations 133 



V. Avian Succession * 134 



1. General Remarks 134 



2. Succession on Isle Royale 134 



a. The Aquatic Association and Habitat 136 



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