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Displaying 1 - 2 of 2
The North American Breeding Bird Survey (1966-present) consists of data on the diversity and abundance of summer bird assemblages at approximately 5000 sites across the continental U.S. and Canada. Sampling began in 1966 and many sites have time-series that are at least 20 years long.MORE
Spot-mapping data for birds combined with information on the local vegetation. This includes information on the number and position of singing males and breeding pairs, as well as information on the number of nests and fledglings. Plots vary in scale from 10 hectares (in closed habitats) to 40 hectares (in...MORE