Abstract
The nests of 4 species of Andean birds are described for the first time: Muscisaxicola rufivertex (parasitized by Molothrus bonariensis, also a first record), Catamenia inornata, Sicalis olivascens, and Carduelis crassirostris. Descriptions of sites, materials, eggs, and nestlings are included.
References
GOODALL, J. F., A. W. JOHNSON y R. A. PHILIPPI, 1957. Las Aves de Chile, Tomo 1: 159. Platt Establecimientos Gráficos, Buenos Aires.
FRIEDMANN, H., 1963. Host Relations of the Parasitic Cowbirds. U.S. National Museum Bulletin N° 233.
FRIEDMANN, H., L. F. KIFF y S. I. ROTHSTEIN, 1977. A Further Contribution to Knowledge of the Host Relations of the Parasitic Cowbirds. Smithsonian Contributions to Zoology N° 235.

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