Page 



DISCUSSION 55 



Importance of Colony Sites 55 



Inventory Methods 56 



Ownership of Colony Sites 56 



CONCLUSIONS 58 



RECOMMENDATIONS 59 



Population Monitoring 59 



Productivity of Colonies 59 



Habitat Requirements 59 



Protection of Waterbird Colonies 60 



REFERENCES 61 



APPENDIXES 



A. Miscellaneous Observations of Osprey Nesting Sites in 1977 . 65 



B. Alphabetical List of Colony Site Names 68 



C. List of Maine Coastal Island Registry Numbers Where 



Waterbirds Were Located in 1977 76 



FIGURES 



Number Page 



1 Study area for survey of coastal nesting waterbirds .... 3 



2 Example of aerial photograph taken with K-17 camera .... 7 



3 Aerial photograph of Wreck Island (297 006) great blue 



heron colony 8 



4 Estimated breeding chronology of Leach's storm-petrels 



nesting in Maine 39 



5 Estimated breeding chronology of double-crested cormorants, 



common eiders, and great blue herons nesting in Maine . . 40 



6 Estimated breeding chronology of three species of gulls 



nesting in Maine 41 



7 Estimated breeding chronology of four species of terns 



nesting in Maine 42 



vn 



