Registros importantes de anátidos en humedales artificiales del valle alto del Río Cauca, Colombia

The upper Cauca River valley (VARC) is considered a region of high diversity of waterbirds, due to the occurrence of different types of natural and artificial wetlands, the latter including reservoirs, lakes, ponds and rice fields. I document the occurrence of four duck species in some artificial wetlands located in Cauca and Valle del Cauca departments: Comb Duck, Yellow-billed Pintail, Green-winged Teal and Northern Pintail. These records are noteworthy because Knob-billed duck and Yellow-billed Pintail are considered threatened species in Colombia and are little studied; the record of Green-winged Teal is the first for the VGRC and the second one for Colombia. The Northern Pintail records are the most recent for this duck in Colombia. Documenting the records of these species is intended to attract interest to this group of waterbirds that need more information regarding their distributions in this country.