98 



North A:\iericax Birds Eggs. 



upon Avhich the tliree to six eggs are laid. They are a pale greenish blue^in 

 color, and measure 1.45 x 1.10. Data. — Avery's Island, Louisiana, April 10, 

 1894. 5 eggs on a platform of twigs placed in a willow tree growing on the edge 

 of a pond. Collected liy E. A. Mcllhenny. 



201a. Frazar Green Heron. Hiitorides rircsrcits frazari. 



A darker variety found in Lower California; nesting the same as the common 

 species. 



201b. Anthony Green Heron. lUitoriiJcs I'ircsreit^^ anfhoniji. 



A lighter, desert form found in the arid jjortions of the interior of southwest- 

 ern United States and Mexico. 



fP 



XEST AND EGGS OF GREEN HEROX. 



202. Black-crowned Night Heron. Xi/ctirora.r nyrtirorax iinriHs. 



Range. — North America from southern British Provinces, southward: winters 

 along the Gulf coast and beyond. 



A well known bird, often called "quawk" from the sound of its note« frequent- 

 ly heard in the evening. While, in some localities, only a few pairs of these 

 birds are found ne-ting together, most of them gather together into large colo- 

 nies during the breeding season. In Xew England they generally select a re- 

 mote pine grove as their l)reeding grounds. If not disturbed they will return 

 to this same place each year. Their nests are built of sticks and lined with 

 small twigs, and are placed well up towards the tops of the trees. 



