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In the present work we record for the first time two altitudinal migrant species (Spatula puna and Oressochen melanoptera), in the Cadillal reservoir, Tucumán, Argentina. The presence of these birds at about 620 meters above sea level constitutes a novel observation for both species because they are at an altitude not recorded for Argentina.
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Lastra et al. (2024) studied this question.
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