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  1. By: Krabbe, Niels,
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 114
    Date: 1994
    Page Range: 55--61
    Publication Info: London, British Ornithologists' Club, 1893-
  2. By: Krabbe, Niels, - Poulsen, Bent Otto - Frolander, Amy
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 116
    Date: 1996
    Page Range: 230--243
    Publication Info: London, British Ornithologists' Club, 1893-
  3. By: Krabbe, Niels, - Sureda, Ana Laura - Canelo, Roberto
    Type: Article
    In: El hornero
    Date: 2009-12-01
  4. By: Fjeldså, Jon - Krabbe, Niels, - Ridgely, R S
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 107
    Date: 1987
    Page Range: 28--31
    Publication Info: London, British Ornithologists' Club, 1893-
  5. By: Krabbe, Niels, - Schulenberg, Thomas S
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 125
    Date: 2005
    Page Range: 253--260
    Publication Info: London, British Ornithologists' Club, 1893-
  6. By: Krabbe, Niels, - Isler, Morton L - Isler, Phyllis R - Whitney, Bret M. - Alonso, J A - Greenfield, Paul J.
    Type: Article
    In: The Wilson bulletin
    Volume: 111
    Issue: 2
    Date: 1999
    Page Range: 157--165
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  7. By: Coopmans, Paul, - Krabbe, Niels,
    Type: Article
    In: The Wilson bulletin
    Volume: 112
    Issue: 3
    Date: 2000-09
    Page Range: 305--312
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  8. By: Krabbe, Niels, - Ridgely, Robert S
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 130
    Date: 2010
    Page Range: 3--7
    Publication Info: London, British Ornithologists' Club, 1893-
  9. By: Krabbe, Niels, - Stejskal, David J
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 128
    Date: 2008
    Page Range: 126--130
    Publication Info: London, British Ornithologists' Club, 1893-
  10. By: Krabbe, Niels,
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 112
    Date: 1992
    Page Range: 169--174
    Publication Info: London, British Ornithologists' Club, 1893-
  11. By: Krabbe, Niels, - Poulsen, Bent Otto - Frolander, Amy - Rodríguez Barahona, Orfa
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 117
    Date: 1997
    Page Range: 248--256
    Publication Info: London, British Ornithologists' Club, 1893-
  12. By: Fjeldså, Jon - Baiker, Jan - Engblom, Gunnar - Franke, Irma - Geale, David - Krabbe, Niels, - Lane, Daniel F - Lezama, Miguel - Schmitt, Fabrice - Williams, Robert S. R. - Ugarte-Núnñez, Joaquiín - Yábar, Virgilio - Yábar, Ramiro
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 132
    Issue: 3
    Date: 2012
    Page Range: 180--193
    Publication Info: London, British Ornithologists' Club, 1893-
  13. By: Krabbe, Niels,
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 124
    Date: 2004
    Page Range: 226--227
    Publication Info: London, British Ornithologists' Club, 1893-
  14. By: Krabbe, Niels,
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 120
    Date: 2000
    Page Range: 149--153
    Publication Info: London, British Ornithologists' Club, 1893-
  15. By: Fjeldså, Jon - Krabbe, Niels,
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 106
    Date: 1986
    Page Range: 115--124
    Publication Info: London, British Ornithologists' Club, 1893-
  16. By: Krabbe, Niels,
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 128
    Date: 2008
    Page Range: 219--227
    Publication Info: London, British Ornithologists' Club, 1893-
  17. By: Mayert, Sjoerd - Coopmans, Paul, - Krabbe, Niels, - Isler, Morton L
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 134
    Issue: 2
    Date: 2014
    Page Range: 145--154
    Publication Info: London, British Ornithologists' Club, 1893-
  18. By: Coopmans, Paul, - Krabbe, Niels, - Schulenberg, Thomas S
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 121
    Date: 2001
    Page Range: 208--213
    Publication Info: London, British Ornithologists' Club, 1893-