David A Sibley
- Comment on "Ivory-billed woodpecker (Campephilus principalis) persists in continental North America"David A Sibley
Post Office Box 1031, Concord, MA 01742, USA
Science 311:1555; author reply 1555. 2006..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...
- Ivory-billed or pileated woodpecker?David A Sibley
Science 315:1495-6; author reply 1495-6. 2007