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  1. By: Jahn, Olaf - Palacios, Byron - Valenzuela, Patricio Mena
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 127
    Date: 2007
    Page Range: 161--166
    Publication Info: London, British Ornithologists' Club, 1893-
  2. By: Jahn, Olaf - Robbins, Mark B - Valenzuela, Patricio Mena - Coopmans, Paul, - Ridgely, Robert S - Schuchmann, Karl-L
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 120
    Date: 2000
    Page Range: 16--22
    Publication Info: London, British Ornithologists' Club, 1893-