Links
- The Publications Warehouse does not have links to digital versions of this publication at this time
- Download citation as: RIS | Dublin Core
Abstract
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 type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | The 1995-1999 Summary of the North American Breeding Bird Survey |
| Series title | Bird Populations |
| Volume | 5 |
| Year Published | 2000 |
| Language | English |
| Contributing office(s) | Patuxent Wildlife Research Center |
| Description | 30-48 |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Bird Populations |
| First page | 30 |
| Last page | 48 |
| Google Analytic Metrics | Metrics page |