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 E-Mail IMAGE: Both bluebirds and tree swallows, like this one, nesting in noisy boxes spent less time incubating their eggs, had fewer eggs hatch and produced fewer young than their neighbors nesting. view more  Credit: Julian Avery, Penn State Some songbirds are not dissuaded by constant, loud noise emitted by natural gas pipeline compressors and will establish nests nearby. The number of eggs they lay is unaffected by the din, but their reproductive success ultimately is diminished. That s the conclusion of a team of Penn State researchers who conducted an innovative, elaborate study that included unceasing playback of recorded compressor noise, 80 new, never-before-used nest boxes occupied by Eastern bluebirds and tree swallows, and behavioral observations with video cameras placed within boxes.

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