Table 2.

Model averaging results from multiple regressions of breeding phenology (median lay date of all attempts/first attempts/renest attempts, termination index, and breeding season length index) in response to monthly spring temperature (temp) and precipitation (prec) during 1995–2011. Predation (pred) intensity and timing were also included as predictors in the latter three models

Model	February temp	March temp	April temp	May temp	February prec	March prec	April prec	May prec	Pred intensity	Pred timing	Model average r2
All attempts
Estimate	−0.03	−2.93	−0.01	−0.16	<0.01	−0.01	<0.01	<0.01	n/a	n/a
±1SE	0.22	0.72	0.25	0.54	0.01	0.02	0.01	0.01	n/a	n/a
Partial r2	<0.01	0.54	<0.01	<0.01	0.01	0.01	<0.01	<0.01	n/a	n/a	0.65
1st attempts
Estimate	−0.14	−3.4	−0.01	n/a	<0.01	−0.01	−0.01	n/a	n/a	n/a
±1SE	0.39	0.74	0.26	n/a	0.01	0.02	0.01	n/a	n/a	n/a
Partial r2	0.01	0.58	<0.01	n/a	<0.01	<0.01	0.01	n/a	n/a	n/a	0.69
Renest attempts
Estimate	n/a	0	−2.74	0	n/a	0	−0.03	0	+3.34	0
±1SE	n/a	0	1.18	0	n/a	0	0.04	0	8.79	0
Partial r2	n/a	0	0.32	0	n/a	0	0.06	0	0.02	0	0.35
Termination
Estimate	n/a	0	−2.79	0	n/a	−0.02	0	0	0	0
±1SE	n/a	0	1.21	0	n/a	0.05	0	0	0	0
Partial r2	n/a	0	0.32	0	n/a	0.02	0	0	0	0	0.33
Breeding season length
Estimate	+1.32	+0.76	−0.60	−0.13	<0.01	−0.01	<0.01	−0.02	+0.02	−0.04
±1SE	1.1	1.21	0.95	0.59	0.01	0.02	0.01	0.04	1.63	0.12
Partial r2	0.24	0.10	0.05	0.01	<0.01	0.01	<0.01	0.04	<0.01	0.02	0.5

Variables not included are indicated by n/a. Variables not retained in the model average are indicated by 0.