The North American Breeding Bird Survey, Analysis Results 1966 - 2021
收藏U.S. Geological Survey2022-01-01 更新2026-04-23 收录
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https://www.sciencebase.gov/catalog/item/632099e0d34e71c6d67aa8e5
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资源简介：
This data product consists of a database of population change and abundance estimates for North American birds, estimated from North American Breeding Bird Survey (BBS) data. Data are presented for 548 species of birds in 4 spreadsheets containing trend estimates and annual indices for 2 time periods. Estimates are derived for each species using the 1 of 4 alternative models, and a cross-validation model selection procedure was used to select the best model for each species.
创建时间：
2022-01-01
