Fig. 4

Relative selection strength estimates for foraging habitats by jackdaws throughout their annual life cycle. Biological periods are (A) nest building, (B) incubation, (C) chick rearing, (D) post fledging, (E) post breeding, and (F) wintering. Estimates (mean values with 95% confidence intervals; exponentiated coefficients) were compared to the selection strength computed for grasslands as a reference level (dashed line; all comparisons led to p < 0.001, except for maize during incubation). Values above and below the dashed line indicate higher and lower relative intensities of use, respectively, under equal habitat availability with grasslands