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Table 4 Effects of weather variables and day of year on nocturnal departure timing (proportion of night at departure) in Northern Wheatears, European Robins and Common Blackbirds

From: Stopover departure decisions in songbirds: do long-distance migrants depart earlier and more independently of weather conditions than medium-distance migrants?

Parameter

Estimate ± SE

95% CI

p

Intercept

−1.171 ± 0.097

−1.361/− 0.981

< 0.001

Species (European Robin)

0.356 ± 0.169

0.025/0.687

0.035

Species (Common Blackbird)

0.379 ± 0.142

0.100/0.657

0.008

Cloud cover

0.238 ± 0.084

0.072/0.403

0.005

Tailwind assistance

−0.213 ± 0.090

− 0.388/− 0.037

0.020

Crosswind

− 0.042 ± 0.065

− 0.170/0.090

0.517

Atmospheric pressure

−0.052 ± 0.072

−0.193/0.090

0.473

Δ air temperature

0.057 ± 0.068

−0.076/0.190

0.400

Day of year

−0.042 ± 0.067

−0.174/0.089

0.530

Species (European Robin) x cloud cover

0.218 ± 0.176

−0.127/0.564

0.216

Species (Common Blackbird) x cloud cover

0.211 ± 0.145

−0.073/0.496

0.146

Species (European Robin) x tailwind assistance

0.085 ± 0.171

−0.251/0.421

0.620

Species (Common Blackbird) x tailwind assistance

−0.259 ± 0.149

−0.551/0.032

0.082

  1. Average model estimates, adjusted standard errors (SE), 95% confidence intervals (CIs) and associated p-values of parameters included in the candidate models in Additional file 1: Table S4 are shown. P-values < 0.05 are given in bold font. Reference category for species is Northern Wheatear