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The 1995-1999 Summary of the North American Breeding Bird Survey

January 1, 2000

Data from the North American Breeding Bird Survey were used to estimate continental and regional changes in bird populations for the 5-yr period 1995-1999 and the 2-yr period 1998-1999. These short-term changes were placed in the context of population trends estimated over the 1966-1999 interval. During 1995-1999, 44% of all species exhibited positive trends over the entire survey area, while 44% of all species exhibited positive trends during 1998-1999; neither of these percentages differed significantly from 50%. The continental and regional percentages of species with positive trends were also analyzed for 12 species groups having shared life-history traits. Survey-wide for the entire survey period, grassland birds exhibited the lowest percentage of increasing species (19%). However, during 1995-1999 the declines were less extreme in the Central and Western BBS regions, with 49% and 36% of species increasing in these regions. Neotropical migrants continued to fare better than grassland birds in all regions, although in the Eastern BBS region only 30% of neotropical species had increasing trends during 1995-1999.

Publication Year 2000
Title The 1995-1999 Summary of the North American Breeding Bird Survey
Authors K.L. Pardieck, J.R. Sauer
Publication Type Article
Publication Subtype Journal Article
Series Title Bird Populations
Index ID 5224089
Record Source USGS Publications Warehouse
USGS Organization Patuxent Wildlife Research Center