Similarities Between Campephilus Woodpecker Double Raps and Mechanical Sounds Produced by Duck Flocks

  title={Similarities Between Campephilus Woodpecker Double Raps and Mechanical Sounds Produced by Duck Flocks},
  author={Clark David Jones and Jeff R. Troy and Lars Y. Pomara},
Abstract The search for the Ivory-billed Woodpecker (Campephilus principalis) in eastern Arkansas and northwestern Florida has yielded double raps recorded by autonomous recording units (ARUs) in White River National Wildlife Refuge and along the Choctawhatchee River, respectively. These double raps have been presented as suggestive evidence for the presence of the species in those regions. We present data comparing double raps produced by wing collisions from an aerial Gadwall (Anas strepera… 

When is an “Extinct” Species Really Extinct? Gauging the Search Efforts for Hawaiian Forest Birds and the Ivory-Billed Woodpecker

Rare species, particularly those in inaccessible habitat, can go years without being observed. If we are to allocate conservation resources appropriately to conserving such species, it is important

Autonomous recording units in avian ecological research: current use and future applications

The use of ARUs in avian ecological research is summarized and current knowledge of the benefits and drawbacks of this technology is synthesized to enable researchers to do more repeat visits with less time spent in the field.



Notes and Double Knocks from Arkansas

In the search for ivory-billed woodpeckers in the Big Woods region of eastern Arkansas, unattended digital autonomous recording units (ARUs) recorded over 17,000 hours of ambient sound at 153 sites between 18 December 2004 and 31 May 2005 and indicate that the notes recorded by the ARU are most similar to those of ivory- bills.

Evidence Suggesting that Ivory-billed Woodpeckers ( Campephilus principalis ) Exist in Florida

The evidence suggests that Ivory-billed Woodpeckers may be present in the forests along the Choctawhatchee River and warrants an expanded search of this bottomland forest habitat.

Summary and conclusions of the 2005 – 06 Ivory - billed Woodpecker search in Arkansas

  • 2006