Snowy egrets seerii to have increased rapidly from 1963 (AFN/AB) to 1975 

 (Custer and Osborn 1977) but decreased in 1976 and 1977. However, the census 

 in 1975 was performed by different observers than in 1976 and 1977. Seven 

 adult cattle egrets were seen at Stratton Island in 1976 (R. Bollengier pers. 

 comm. ) but nesting was not confirmed. In 1977, incipient nest-building was 

 observed, but no nests or young were found (Vickery 1977). 



Black-crowned night herons always have nested commonly in southern f'aine, 

 but only at one or two locations (Norton 1915, Gross 1951b, RNEB). A reduc- 

 tion occurred from 1975 to 1977, primarily at the Wood Island colony. A pair 

 of Louisiana herons were found at Stratton Island for the first time in 1976 

 (R. Bollengier pers. comm. ) and again in 1977 (Vickery 1977), constituting the 

 northern-most site for this species. Four pairs of little blue herons nested 

 at Stratton Island in 1977 (Vickery 1977), also representing a northern range 

 expansion. Green herons, which usually nest solitarily or in small, loose 

 colonies, probably have bred at scattered locations for many years even though 

 they have seldom been reported. None were found in mixed heronries in 1976 or 

 1977. Great blue herons nest inland and on coastal islands further north. 



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