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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?

ParameterEstimate ± SE95% CIp
Intercept−1.171 ± 0.097−1.361/− 0.981< 0.001
Species (European Robin)0.356 ± 0.1690.025/0.6870.035
Species (Common Blackbird)0.379 ± 0.1420.100/0.6570.008
Cloud cover0.238 ± 0.0840.072/0.4030.005
Tailwind assistance−0.213 ± 0.090− 0.388/− 0.0370.020
Crosswind− 0.042 ± 0.065− 0.170/0.0900.517
Atmospheric pressure−0.052 ± 0.072−0.193/0.0900.473
Δ air temperature0.057 ± 0.068−0.076/0.1900.400
Day of year−0.042 ± 0.067−0.174/0.0890.530
Species (European Robin) x cloud cover0.218 ± 0.176−0.127/0.5640.216
Species (Common Blackbird) x cloud cover0.211 ± 0.145−0.073/0.4960.146
Species (European Robin) x tailwind assistance0.085 ± 0.171−0.251/0.4210.620
Species (Common Blackbird) x tailwind assistance−0.259 ± 0.149−0.551/0.0320.082
  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