Source and sink habitats of Red-winged Blackbirds in a rural/suburban landscape

Article Abstract:

Research in the Boulder, CO area between 1995 and 1997 indicates that sources for Red-winged Blackbirds have disappeared from natural habitats where they once occurred, such as tallgrass prairie and wetlands. While sinks consistently occurred in anthropogenic habitats such as ditches, predation by corvids and raccoons determined source-sink status, and functioned as human-commensal predators with encroaching urbanization.

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Stable-carbon and hydrogen isotope ratios reveal breeding origins of Red-winged Blackbirds

Article Abstract:

Results suggest that using stable-carbon and hydrogen isotope ratios are a reliable means of determining blackbird breeding origins along a latitudinal transect from Louisiana to Saskatchewan. The method was applied to the outer primary feathers, which determined dietary intake of carbon and precipitation exposure.

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Effects of exurban development on biodiversity: Patterns, mechanisms, and research needs

Article Abstract:

The existing knowledge on the effects of urban fringe development (UFD) and rural residential development in the United States is synthesized. It is found that many native species have reduced survival and reproduction near homes, and native species richness mostly drops in increased exurban densities.

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