Table 1.

Best model explaining bird FID according to speed limit and covariates (see text for details). (Birds standing on the road or on the edge was defined as location. Season is a binomial variable, with spring–summer used as reference season. CI, confidence interval; pm, posterior mean. Species was included as a random effect.)

variablepmCIpMCMC
intercept0.454(−0.678; 1.398)0.324
location0.790(0.440; 1.174)<0.001
speed limit0.016(0.007; 0.024)<0.001
body mass0.002(0.000; 0.003)0.030
season0.591(0.229; 0.999)0.004