Table 1.

Results of general linear models on spatial patterns of variation in δ²H_f for migratory Loggerhead Shrike

Model	AICc	ΔAICc	AICc weight
Latitude+Region+Age	2767	0	0.86
Latitude+Region+Age+Latitude:Region	2772	4	0.11
Latitude+Region	2774	7	0.03
Latitude+Region+Latitude:Region	2778	11	0
Latitude+Subspecies	2779	12	0
Latitude+Subspecies+Latitude:Subspecies	2787	20	0
Latitude+Age	2805	38	0
Latitude+Age+Latitude:Age	2807	40	0
Latitude	2818	51	0
Intercept	2824	57	0