Table 1. Coefficients (mean, SD, and 2.5th and 97.5th percentiles) of the variables included in the models of song frequency (dominant frequency of the lowest tonal note) as a function of traffic noise. Colluricincla harmonica Rhipidura fuliginosa Variable Mean SD 2.5% 97.5% Mean SD 2.5% 97.5% Constant 1583 52 1480 1687 4352 53 4248 4456 Traffic noise 5.81 4.31 -2.52 14.5 0.265 4.20 -8.07 8.53