nest boxes

nest boxes

research site

The experiment was conducted at Penn State’s Russell E. Larson Agricultural Research Center at Rock Springs, in central Pennsylvania. Researchers established 40 pairs of nest boxes to attract bluebirds and tree swallows and immediately introduced shale gas compressor noise to half the boxes before birds returned to the region, while the other 40 boxes served as controls. Speakers are shown here.

IMAGE: Julian Avery/Penn State