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All stations use the Old Bird 21c microphone. Data are extracted in real time with Tseep-r software. Click on the station name to access historical data, tentative species information, and wav files of the flight calls for most nights.

Bill Evans is editor of these data and performs the initial species classification. Fine tuning of the classification is ongoing and any updates are noted in a Readme text file associated with each nightly call archive. In all cases, calls within a species folder should only be considered candidates for that species or species group based on best available evidence.

The flight calls and information available on this website are intended as a public resource and are licensed as follows:

Creative Commons Attribution-NonCommerical-ShareAlike 3.0 Uniported License.

Any distribution of calls and information should attribute Old Bird Inc as well as the host and sponsor (if noted) for the source acoustic station(s).