Estancia Espartilla, Argentine Republic. 205 



-f72. Ardea candidissima, Gm. 



Common all the year^ being found in company with 

 A. egretta during the autumn. 



73. BUTORIDES CYANURUS (LiuU.). 



Very rare ; I liave observed only two specimens in 

 November. 



74. Ardetta involucris^ Vieill. 



Fairly common all the year^ living in pairs. Breeds early 

 in November. Eggs three in number. 



75. Nycticorax obscurus^ Bp. 



Fairly comiiion from September to January, living and 

 breeding in the lagoons amongst the rushes. I have occa- 

 sionally found them roosting in the montes in January, 



7Q. EUXENURA MAGUARI (Gm.). 



Common all the year round, flocking in the autumn and 

 throughout the winter. Breeds early in October. The eggs 

 are three in number, varying in size. The native name is 

 '' Ciguena.'^ 



-{-77. Plegadis guarauna (Linn.). 



Very common throughout the year, seeming to be always 

 about in flocks. I do not know where they breed. There is 

 a partial migration from August to November. The native 

 name is " Cuervo.^' 



78. Theristicus caudatus (Bodd.). 



Fairly common in flocks from May to August. They have 

 a settled roosting-place, as every evening they all take their 

 departure southwards, returning next morning. 



79. Phimosus infuscatus (Licht.). 



Rare; appearing in May and departing early in August, 

 living in scattered flocks. 



•f 80. Ajaja rosea, Reichenb. 



Fairly common at all times in pairs or singly, both the 

 pale and pink varieties. Breeds late in November. The 

 native name is " Chopla.^^ 



