Comment on "Ivory-billed woodpecker (Campephilus principalis) persists in continental North America".

@article{Sibley2006CommentO,
  title={Comment on "Ivory-billed woodpecker (Campephilus principalis) persists in continental North America".},
  author={David Allen Sibley and Louis R. Bevier and Michael A. Patten and Chris S. Elphick},
  journal={Science},
  year={2006},
  volume={311 5767},
  pages={
          1555; author reply 1555
        }
}
We reanalyzed video presented as confirmation that an ivory-billed woodpecker (Campephilus principalis) persists in Arkansas (Fitzpatrick et al., Reports, 3 June 2005, p. 1460). None of the features described as diagnostic of the ivory-billed woodpecker eliminate a normal pileated woodpecker (Dryocopus pileatus). Although we support efforts to find and protect ivory-billed woodpeckers, the video evidence does not demonstrate that the species persists in the United States. 

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