488 
THE WILSON JOURNAL OF ORNITHOLOGY • Vol. 124. No. 3. September 2012 
wintering sites of Magellanic' ^ 1° SOUthcm Argcnlina during the breeding season (circles) and tl 
-arched in 2006. «"*> « shown with dotted rectangles around at 
mool^T" 1 (Sonano 1983 ’ Quirts and D, 
)■ Many lakes have a large area devoic 
vegetation on the windward side of the lake ha 
i y-three lakes were surveyed, and 35 of il 
were searched in both seasons. In addition. 4 
e shoreline of Lago Argentine (50 19 ' S, 
initiate' f 7( ! U Rm freshwaler that at 
muiates f,- 0 , 1 , Andean glaciers) was searched , 
day h C t ‘ f y Calafalc - A11 >^es in the study 
but on S v, Und Unve « etated shorelines, and 
were on'o" :", ^ Nacio " aI Monte Le 
cond season aL 4>7 Wned ^ ranches - The 
—40% «r i 1 ~° 7, was Particularly dry ; 
season were "surte"' 1 ' U ' rOUghl1111 ,he 2 C 
ary. Surveys were also conduct 
along 12.5 km of the banks of three rivers 
(big. 1): 6 km of the Gallegos River (51 37' S. 
69 36 W) west from the ruta 3 bridge at Gtier 
Aike. 2 km of the Santa Cruz River (50 00' S. 
68 55' W) west from the village of Cmdte Luis 
Piedra Buena, and 4.5 km of the Chico River 
(48 46’ S. 70 15' W) southeast of the village ol 
Gobemador Gregores. 
Observers (2-3) walked parallel transects 
around the perimeter of a lake, or along the banks 
ol a river to locate breeding pairs of plovers 
stopping every 100-150 m to complete a 360 
scan using a 40X spotting scope. Behavioral 
cues were used to ascertain breeding status when 
individual plovers were located. We observed two 
