Table S2.

Number of parameters (k), Bias-corrected Akaike’s Information Criterion value (AIC), the difference between a given model and the model with the lowest AIC value (ΔAIC), and the AIC weight of models for white-crowned sparrow laboratory foraging and vigilance experiments

ModelkAIC∆AICwi
Foraging: head down duration (s)
 dB2−54.1340.000.51
 dB+trial+time4−52.21611.920.20
 dB+day3−52.16631.970.19
 dB+day+trial+time5−50.46673.670.08
 null2−47.59416.540.02
Vigilance: head up rate (head lifts per s)
 dB+day3−23.5430.000.70
 null2−20.49753.050.15
 dB+day+trial+time5−19.79833.740.11
 dB2−17.24156.300.03
 dB+trial+time4−13.70579.840.01
Foraging bout
 dB2292.09770.000.70
 dB+day3293.98051.880.27
 dB+day+trial+time5295.5773.480.12
 null2296.99854.900.06
 dB+day+trial+time5297.48845.390.05