Birds of Central Patagonia. 
401 
*Querquedula elavirostris. 
Resident. Common throughout our journey, and nesting 
at the mouth of the Sengelen. 
-j-^QuERQUEDULA VERSICOLOR. 
Resident. The same remark applies to this as to Q. fla- 
virostris. 
*Dafila spinicauda. 
Resident, and common in the valleys of both the Sengel 
and Sengelen. 
*Mareca sibilatrix. 
The commonest Duck met with during our journey, and 
nesting abundantly at the mouth of the Sengelen. 
^Spatula platalea. 
Resident. Common up the Sengelen and Sengel. Near 
the mouth of the former river, just after it leaves the lake, 
there exists a chain of small lagoons surrounded by extensive 
reed-beds, and forming a perfect paradise for Ducks, Geese, 
and Coots, which there abound. 
- *ErISMATURA PERRUGINEA. 
Resident. Pretty common in lagoons bordering the Sen¬ 
gelen and Sengel, where I observed a curious habit of the 
male bird. When he is enraged at the presence of an in¬ 
truder in his haunts, he puffs out his breast to its fullest 
extent; and bringing down his beak on the hollow thus formed 
with considerable force, a curious drumming noise is produced, 
which I have heard at a distance of fifty yards. At the same 
time he raises and expands his tail, and, swimming round and 
round to display his terrors, appears a ridiculous picture of 
defiance. 
*CoLUMBA MACULOSA. 
Resident. Commonly observed throughout our journey. 
PULICA ARMILLATA. 
Common in the lakes and on the Sengel and Sengelen. 
The adult has the beak and shield primrose-yellow, the latter 
large and oval; the base of upper mandible and small portion 
