Data for: Traffic noise exposure alters nestling physiology and telomere attrition through direct, but not maternal, effects in a free-living bird

Data from Tree Swallow populations in Davis, CA. Data taken during 2016 breeding season. Traffic noise was experimentally applied to field sites and eggs were cross-fostered between nests that had exposure to varying traffic noise amplitudes. We then assessed direct vs. maternal effects of noise on nestling baseline and stress-induced cort, body condition, and telomere attrition.