Table 2. Climate models obtaining substantial support (ΔAICc≤2) and the base temporal model (‘Year + Age’) describing male arrival date (n = 210) and female clutch initiation dates (n = 177) for yellow warblers in Revelstoke, British Columbia.

Model #	Period	Variables	r2	K	AIC.c	ΔAICc	ωi
Male Arrival:
3b	Migration	U-WIND + AGE + U-WIND*AGE	0.21	5	1452.88	0	0.535
1b	Winter	SOIMAY-AUG + AGE + SOIMAY-AUG *AGE	0.20	5	1453.85	0.98	0.328
-	-	YEAR+AGE	0.18	9	1464.32	11.44	0.002
Female clutch initiation date:
3b	Migration	U-WIND + AGE + U-WIND*AGE	0.16	5	1194.89	0	0.289
5a	Migration	U-WIND + V-WIND + AGE	0.15	5	1195.00	0.11	0.273
3a	Migration	U-WIND + AGE	0.14	4	1195.82	0.93	0.181
5b	Migration	U-WIND + V-WIND + AGE + U-WIND*AGE +V-WIND*AGE	0.16	7	1196.47	1.58	0.131
-	-	YEAR + AGE	0.16	9	1197.90	3.00	0.064

Age was included in all models as a covariate (see Methods). Wintering model support for male arrival date was counter to prediction (see Discussion).