Ivory-billed Woodpecker Calls, 1935

These Ivory-billed Woodpecker calls were recorded at close range in 1935 by Arthur Allen and collaborators in the Singer Tract, Louisiana. The clip here was extracted from about five minutes of recordings at a nest cavity where both male and female were present.

Listen to calls recorded near a pair of Ivory-billed Woodpeckers at a nest cavity using Interactive Analyzer or Simple Sounds. Choose "Interactive Analyzer" to explore the sonogram and see it scroll across the page as the sound plays. Choose "Simple Sounds" for a faster downloadof a fixed sonogram and an audio file.

What do Ivory-billed Woodpecker calls sound like in other contexts, away from a nest, or from a distance over water and through trees? Researchers are limited in their knowledge of Ivory-billed Woodpecker vocalizations because so few recordings exist.

The autonomous recording units in the Big Woods are most likely to pick up the sounds of an Ivory-billed Woodpecker from a distance. The only definitive recordings, from 1935, were captured at close range. Bioacoustics researchers played the calls about 145 meters from an autonomous recording unit in the Big Woods to use in comparison with distant sounds recorded during the search in 2004-05.

Listen to calls of Ivory-billed Woodpecker, originally recorded by Arthur Allen in 1935, broadcast and recorded from 145 meters away to simulate sounds of a distant bird. Interactive Analyzer or Simple Sounds

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Audio Playback Requirements

Two audio formats are in use:
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Simple Sounds provide fixed sonagram images and RealAudio recordings. A free RealAudio player is available for download.