Black-crowned night herons have increased during the century by a sub- 

 stantial amount (Stone 1937, Fables 1955). Although its population probably 

 decreased because of pesticides in the 1950' s and 1960's, it is presently the 

 third most abundant wader in the State (Kane and Farrar 1977). Yellow-crowns 

 are difficult to census. Total estimates never exceeded 75 pairs until 1977 

 when 139 pairs were reported (Kane and Farrar 1977). Fables (1955) listed it 

 as "rare" in southern New Jersey. 



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