Dov/ning, R.L. 1973. Preliminary nesting survey of least terns and black skim- 

 mers in the East. Am. Birds 27:946-949. 



Drury, W.H. 1963a. Results of a study of herring gull populations and move- 

 ments in Southeastern New England. Pages 207-217 vn Colloque: Le Probleme 

 des Oiseaux sur les Aerodromes. Nice, France. 



Drury, W.H. 1963b. Herring gull populations and movements in Southeastern 

 New England. Massachusetts Audubon Soc. Rep. 



Drury, W.H. 1973. Population changes in New England seabirds. Bird-Banding 

 44:267-313. 



Drury, W.H. 1974. Population changes in New England seabirds (continued). 

 Bird-Banding 45:1-15. 



Duffy, D. 1977. Breeding populations of terns and skimmers on Long Island 

 Sound and Eastern Long Island, 1972-1975, Proc. Linnaean Soc. N. Y. 73:1-48. 



Dunn, E.K. 1973. Changes in fishing ability of terns associated with wind 

 speed and sea surface conditions. Nature 244:520-521. 



Dutcher, W. 1901. Results of special protection to gulls and terns obtained 

 through the Thayer Fund. Auk 18:76-103, 183-190. 



Dutcher, W. 1902. Results of special protection to gulls and terns obtained 

 through the Thayer Fund. Auk 19:34-63. 



Dutcher, W. 1903. Report of the A.O.U. Committee on the protection of North 

 American birds. Auk 20:101-159. 



Eberhard, L. 1968. A preliminary appraisal of line transects. J. Wild! .Manage. 

 32:82-88. 



Erwin, R.M. 1975. Comparative foraging and breeding strategies of three sea- 

 bird species, the royal tern, Sterna maxima , common tern, S^. hirundo , and 

 black skimmer, Rynchops niger . Ph.D. Thesis. Univ. of Maryland, College 

 Park. Ill pp. 



Erwin, R.M. 1977a. Population and colony site dynamics in selected Massachu- 

 setts waterbirds. Pages 19-25 jjl W.E. Southern ed. Proc. 1977 conference 

 of the Colonial Waterbird Group. DeKalb, Illinois. 



Erwin, R.M. 1977b, Black skimmer breeding ecology and behavior. Auk 

 94:709-717. 



Erwin, R.M. 1978. Coloniality in terns: The role of social feeding. Condor 

 80:211-215. 



Erwin, R. M. and, C. Korschgen. 1979. Coastal waterbird colonies: Maine 

 to Virginia, 1977. FWS/OBS-79/08. U.S. Fish and Wildlife Service, Office 

 of Biological Services. 



Fables, D. 1955. Annotated list of New Jersey birds. Urner Ornithol. Club, 

 Newark. 95 pp, 



118 



