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Range DescriptionFulica cornuta is known from a few high altitude Andean lakes in south-west Bolivia (Oruro in 1903, PotosÃ), north Chile (TarapacÃ¡, Antofagasta, Atacama), and north-west Argentina (Jujuy, Salta, Catamarca in 1918, TucumÃ¡n, San Juan) (Haene and MontaÃ±ez 1996). Large concentrations have been recorded only occasionally, most notably 8,988 in the Vilama and Pululos area of Argentina in October 1995 (TWSG News 9 1996: 34-39), and 2,800 birds on Laguna Pelada, Bolivia, in November 1989 (Cabot and Serrano 1982). It normally occurs at low densities, with 1-10 nesting pairs at most sites, and up to 70-90 at a few (Taylor 1996, TWSG News 9 1996: 34-39). The Chilean population is estimated at 620 birds (Glade 1988), and Bolivia seems to hold a healthy population (Rocha and Quiroga 1996). The global population is likely to be in the range of 10,000-19,999 individuals. There is no definite evidence of a recent decline (Taylor 1996), but local populations are believed to fluctuate greatly between periods of drought and inundation.