189 
the Province of Buenos Ayres. 
87. Ardea cocoi, Linn. ; Scl. et Salv. P. Z. S. 1869, p. 634. 
Resident and the commonest Heron here. Common at 
Baradero in April. 
-f. 88. Ardea egretta, Gm. ; Scl. et Salv. Nomencl. p. 135. 
Not so numerous as the next mentioned, and, like that bird, 
in dry seasons not seen for months together. Iris dark orange. 
Legs dark lead-colour. 
-f- 89. Ardea candidissima, Gm. ; Scl. et Salv. 1 . s. c . 
Resident; but its absence or presence is very much de¬ 
pendent on the amount of rain we have. Iris pale yellow; 
legs dark lead-colour. 
90. Ardetta involucris (Vieill.); Scl. et Salv. P. Z. S. 
1869, p. 635; Hudson, P. Z. S. 1875, p. 623. 
Probably resident, though I have only observed it in the 
spring. It frequents the thickest reed-beds, and is very shy. 
When flushed it has a frightened hurried flight, and always 
drops again before flying far. Iris pale orange, the centre 
rather lighter; legs light pea-green; beak yellowish green. 
The young are at first covered with quite black down. 
91. Nycticorax obscurus, Bp. ; Scl. et Salv. Nomencl. 
p. 136. 
Resident, and more generally distributed than the last- 
named species. Feeds chiefly on fish. Iris dull crimson; 
upper mandible and tip of lower one black, remainder of lower 
mandible yellowish green ; legs light pea-green, undersides 
with a tinge of yellow. 
92. Ciconia maguari, Gm.; Scl. et Salv. Nomencl. p. 126. 
Resident, and generally very common; but during the dry 
season very few are seen. In December last I saw two birds 
of the year at Punta Lara barely able to fly; these may have 
been bred there. Common at Baradero in April. 
fl-93. Falcinellus igneus (Gm). 
Ibis falcinellus , Scl. et Salv. P. Z. S. 1868, p. 145. 
Residents though more numerous in the winter than sum¬ 
mer, very common, and generally distributed. Eminently 
gregarious in its habits, and flying in a large body in a V- 
shaped form. My statement that they feed on carrion should 
