1S84.J Hakkows 071 r>ir<h of the Lotvcr Uruguay. -^^ T 



parties at this place, while at Buenos Aires Hocks of luuidrecls 

 were frequently seen. It was not met with south of Azul. Of 

 its breeding habits I learned nothing. 



143. Ardea cocoi Linij. Garza (Heron). — A rather 

 common resident, but most abundant in winter. Probably breeds. 

 Not met with on the pampas, where, however, it does occur in 

 abundance at some seasons. 



143. Ardea egretta Crwz. Garza rlanca (White Heron). 

 — Abundant; resident; breeds. Seen at every point visited, 

 even as far south as Carhu6, where it was abundant early in 

 April, the coldest season. 



144. Ardea candidissima Gm. Garza blanca chica 

 (Little White Heron). — Less abundant than the preceding, 

 but with the same distribution. Doubtless breeds at Concepcion. 



145. Ardea sibilatrix Temm. — Not common ; shy, and 

 solitary. Se3n only a few times, in November. Though much 

 resembling the Night Heron, they were active by day. and when 

 disturbed flew rapidly away from the streams and swamps towards 

 the dry woods and sand-hills. Their flight is much quicker than 

 that of any other Heron of my acquaintance. 



146. Butorides cyanurus {Vieill.'). — Abundant, but only 

 in spring and summer, when it is so unsuspicious that you may 

 frequently row past it in a boat at twenty-five feet distance with- 

 out disturbing it in the least. I s.iw^ it only at Concepcion, where 

 it undoubtedly breeds. 



147. Ardetta involucris ( VieilL). — This tiny Heron, so 

 similar to our own A. exilis^ seems to be a rather common 

 summer resident from Brazil almost or quite to Patagonia. 

 Indeed it may remain the whole year round in the marshes of 

 the pampas, for while I only met with it in summer at Concep- 

 cion I several times saw it at Carhu6 in April, long after winter 

 had fairly set in. It is rarely seen, even where most abundant, 

 and it was almost impossible to get a second sight at one which 

 had been once started from the reeds. I did not succeed in finding 

 its nest. 



148. Nycticorax gardeni Gm. — Abundant ; resident ; prob- 

 ably breeds, but I did not meet with its nest. Precisely similar 

 in all its habits to the same bird here. 



149. Ciconia maguari {Gm.). Ciguena (Stork). — A 

 rather common resident at Concepcion ; often seen standing statue- 



