North American Bird Phenology Program

The North American Bird Phenology Program (BPP), part of the USA-National Phenology Network, was a network of volunteer observers who recorded information on first arrival dates, maximum abundance and departure dates of migratory birds across North America. (Phenology is the study of the timing of natural events.) Active between 1880 and 1970, the BPP was coordinated by the federal government and sponsored by the American Ornithologists' Union. It exists now as a historic collection of six million migration card observations, illuminating almost a century of migration patterns and population status of birds.

Today these records are being scanned and placed on the Internet so the information can be curated and made publicly available. Become one of the many volunteers worldwide who transcribe these records on the BPP Web site and add them into a database for analysis. This will allow the migration records to become accessible to the public and to scientists for analysis.

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