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Table 1 Averaged model for the effects of weather variables and population on departure probability of individual blackbirds

From: A partial migrant relies upon a range-wide cue set but uses population-specific weighting for migratory timing

Parameter Estimate (β) ± SE 95% CI p-value
Day length  − 3.65 ± 1.17  − 5.95 ±  − 1.35  < 0.01
Residual ambient temperature  − 0.17 ± 0.09  − 0.34 ± 0.01 0.05
Atmospheric pressure 0.30 ± 0.12 0.06 ± 0.53 0.01
Cloud cover  − 0.42 ± 0.11  − 0.64 ±  − 0.21  < 0.01
Tailwind assistance 0.29 ± 0.13 0.04 ± 0.53 0.02
Crosswind 0.59 ± 0.11 0.38 ± 0.81  < 0.01
Population (Finland) × Day length 0.73 ± 0.54  − 0.33 ± 1.79 0.18
Population (Russia) × Day length 1.95 ± 0.81 0.36 ± 3.54 0.02
Population (Poland) × Day length 1.82 ± 0.64 0.56 ± 3.08  < 0.01
Population (Finland) × Atmospheric pressure  − 0.27 ± 0.37  − 0.99 ± 0.45 0.46
Population (Russia) × Atmospheric pressure  − 0.36 ± 0.37  − 1.08 ± 0.36 0.33
Population (Poland) × Atmospheric pressure 1.00 ± 0.40 0.21 ± 1.79 0.01
Population (Finland) × Cloud cover 0.38 ± 0.44  − 0.48 ± 1.24 0.39
Population (Russia) × Cloud cover  − 0.74 ± 0.31  − 1.33 ±  − 0.14 0.02
Population (Poland) × Cloud cover  − 0.29 ± 0.46  − 1.19 ± 0.60 0.52
Population (Finland) × Tailwind assistance 0.37 ± 0.28  − 0.17 ± 0.92 0.18
Population (Russia) × Tailwind assistance 1.31 ± 0.44 0.44 ± 2.17  < 0.01
Population (Poland) × Tailwind assistance 0.11 ± 0.27  − 0.42 ± 0.64 0.68
Population (Finland) × Crosswind  − 0.63 ± 0.25  − 1.12 ±  − 0.14 0.01
Population (Russia) × Crosswind  − 0.29 ± 0.39  − 1.05 ± 0.47 0.45
Population (Poland) × Crosswind  − 1.28 ± 0.30  − 1.86 ±  − 0.69  < 0.01
  1. Adjusted Akaike’s Information Criterion (AICc) has been used to determine the final candidate models (Additional file 1: Table S1)
  2. Average model estimates, adjusted standard errors (SE), 95% confidence intervals (CIs) and associated p-values of parameters included in the candidate models. p-values ≤ 0.05 are given in bold font. The reference category for species is the German population