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Range DescriptionWetmorethraupis sterrhopteron is a poorly-known species of the Cordillera del Cóndor in Zamora-Chinchipe, Ecuador, and north Amazonas, Peru. It occurs on the west slopes above the río Nangaritza in Ecuador (Balchin and Toyne 1998), and lower east slopes and foothills above the ríos Marañón and Cenepa in Peru (O'Neill 1969, Begazo et al. 2001, Clements and Shany 2001). According to Aguaruna Indians, it also occurs in forests at the headwaters of the río Nieva, Amazonas (J. P. O'Neill in litt. 2000), well south-east of its known range. It appears common in suitable habitat in Peru (O'Neill 1969), but its abundance in Ecuador has not been estimated (Marín et al. 1992, Schulenberg and Awbrey 1997, Balchin and Toyne 1998).