Breeding Bird Census
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 open habitats). This dataset is largely unused and the current link to the raw data is broken.
Dataset Information: http://www.pwrc.usgs.gov/birds/bbc.html