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Range DescriptionPsarocolius cassini is known from the foothills and lowlands around the serranías de los Saltos and de Baudó, Chocó, north-west Colombia, where four specimens were taken in 1858, 1940 and 1945. Until recently, the only sightings were from a nesting colony at the headwaters of the río Acandí in 1991 (Renjifo et al. 2002), and north of Ensenada de Utría National Park in 1997 and 1999, when two and six individuals respectively were seen (Strewe 1999). However, two groups of 7-12 individuals were seen in the Siviru and Tipicay river basins, and 60 inactive nests documented (Fundación ProAves 2008). Its occurrence in the río Juradó valley has never been documented, and this area should not be considered a valid locality (Renjifo et al. 2002).