Population trends of quails in North America
We used North American Breeding Bird Survey data (1966-91) to estimate distribution, relative abundance, and populatiori trends of quails. Population trends in grassland/shrub birds sympatric with northern bobwhite (Colinus virginianus) were also examined. Northern bobwhite and scaled quail (Callipepla squamata) populations have declined since 1966. Rates of decline for these quails have increased during the past decade. California quail (C. californica), Gambel's quail (C. gambeliI), and mountain quail (Oreortyx pictus) populations have been stable over the long-term (1966-91). However, the short-term (1982-91) trend for California quail is positive, whereas Gambel's quail appear to be declining. Patterns in trends indicate similar factors may be negatively affecting breeding populations of grassland/shrub birds throughout the bobwhite's range. We discuss plausible hypotheses to explain population trends and recommend future action.
Citation Information
Publication Year | 1993 |
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Title | Population trends of quails in North America |
Authors | K.E. Church, J.R. Sauer, Sam Droege |
Publication Type | Book Chapter |
Publication Subtype | Book Chapter |
Index ID | 5210546 |
Record Source | USGS Publications Warehouse |
USGS Organization | Patuxent Wildlife Research Center |