(RUSTY LAKE-DUCK.)
+Erismatura ferruginea+, _Scl. et Salv. Nomencl._ p. 131; _iid. P. Z.
S._ 1876, p. 404; _Sclater, P. Z. S._ 1872, p. 549 (Rio Negro);
_Burmeister, P. Z. S._ 1872, p. 368 (Buenos Ayres); _Durnford,
Ibis_, 1877, p. 42 (Chupat), p. 192 (Buenos Ayres), et 1878, p.
401 (Central Patagonia).
_Description._--Above chestnut-red, whole head and neck black; wings
and tail brown: beneath dirty white, sprinkled with brown; breast
and flanks chestnut; bill bluish; feet brown: whole length 16·0
inches, wing 5·5, tail 3·8.
_Hab._ Central Peru, Chili, and Argentina.
This Lake-Duck ranges from Central Peru and the north Argentine
provinces to Patagonia in the south, but is in no place a very common
bird. It inhabits interior lakes and streams, living almost as much in
the water as a Grebe, which in habits it resembles, remaining motionless
when disturbed, but gradually sinking lower in the water, and diving,
when only the head and neck are visible above the surface.