Fig. 2

Effects of temporal predictors on barn swallow post-breeding migration route characteristics. Only covariates that were statistically significant in linear models reported in Table 4 are shown (in the same order as they appear in Table 4). Fitted lines (with 95% confidence bands) are derived from the analyses displayed in Table 4; broken lines represent a slope = 1 for comparison (when relevant; see Results). Filled dots: 2010; empty dots: 2011. See methods for how centred variables and residuals were calculated