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| Smith, Paul and Fretes, Aldo Two unrelated species of birds (Myiopsitta monachus; Psittacidae and Coryphistera alaudina; Furnariidae) simultaneously building the same nest in the Paraguayan Chaco. Ecología en Bolivia, Apr 2013, vol.48, no.1, p.52-56. ISSN 1605-2528
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