Flexible reaction norms to environmental variables along the migration route and the significance of stopover duration for total speed of migration in a songbird migrant

Table 4 Variation in total speed of migration

	Total stopover duration [days]		Mean travel speed [km/days]
Parameter	Estimate	95% CrI	Estimate	95% CrI
Intercept	2.69	2.54 – 2.84	1.68	-0.35 – 3.47
Log10 (predictor)	-0.31	-0.41 – -0.20	0.20	-0.50 – 0.99
Season			0.12	0.02 – 0.22
Standard deviation of random factor individual bird	0.004		<0.001
Standard deviation of residuals	0.055		0.09
Sample size (number of migrations)	16		16
Marginal R²	0.74		0.34
Conditional R²	0.74		0.34

Results of two linear mixed effect models explaining between-individual variation in total speed of migration by the predictor ‘total stopover duration’ and by the predictors ‘mean travel speed’ and ‘season’. In the first model, the fixed effect ‘season’ was not significant, 95% CrI: -0.17–0.01 and therefore omitted in the final model. Estimates and 95% CrI are given for each environmental variable. 95% CrI not including zero are given in bold

ISSN: 1742-9994