Birdsong tuned to the environment: green hylia song varies with elevation, tree cover, and noise Kirschel, A. N.; Blumstein, D. T.; Cohen, R. E.; Buermann, W.; Smith, T. B.; Slabbekoorn, H. Behavioral Ecology 29, 1089–1095, 2009. Published Work Visit Site Social media impact badge provided by Altmetric