House sparrows are abundant near human habitations. In these areas they serve as an important prey base for birds of prey and they may have an impact on plant communities because they consume large quantities of seeds. House sparrows seriously impact populations of native birds, such as bluebirds, chickadees, cliff swallows, and some woodpeckers. House sparrows take over the nesting cavities of native birds, including expelling adults and nestlings by force.
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