- Ivory-billed woodpecker (Campephilus principalis) persists in continental North AmericaJohn W Fitzpatrick
Cornell Laboratory of Ornithology, Cornell University, 159 Sapsucker Woods Road, Ithaca, NY 14850, USA
Science 308:1460-2. 2005..Extensive efforts to find birds away from the primary encounter site remain unsuccessful, but potential habitat for a thinly distributed source population is vast (over 220,000 hectares)...
- Notes and double knocks from ArkansasRussell A Charif
Science 309:1489. 2005