Table 3.

Movement decisions of arctic raptors according to environmental predictors (snow cover, wind support, and crosswind) at one-day step length.

Species (n = number of locations)	Pred.	Coef.	SE	z value	p value	ΔAIC	AIC Weight	LL
Snowy owl n = 41316	Snow cover	−0.01	0.04	−0.13	0.90	2	0.3	−35026
	Wind support	−0.05	0.00	−10.99	<0.001	118*	1.0
	Crosswind	−0.00	0.01	−0.52	0.61	2	0.3
Rough-legged buzzard n = 72479	Snow cover	−0.05	0.03	−1.88	0.06	2	0.7	−72409
	Wind support	0.01	0.00	2.92	0.004	6*	1.0
	Crosswind	0.06	0.00	17.02	<0.001	282*	1.0
Peregrine falcon n = 4147	Snow cover	0.07	0.25	0.29	0.77	2	0.3	−2753
	Wind support	−0.06	0.02	−3.53	<0.001	10*	1.0
	Crosswind	0.03	0.02	1.78	0.08	1	0.6

We performed mixed conditional logistic regression models with movement choice (chosen vs alternative locations) as a dependent variable, snow cover, wind support, and crosswind as predictors and stratum nested in individual as a random effect. We performed the models separately by species. To evaluate the effect of the predictor, we compared models with and without that predictor. Only the results of the full models are presented and those with lower AIC and ΔAIC > 2 are marked with *.