Sources of variation in foraging-patch use.

General Linear Mixed Model of the cumulative time feeding at 10 foraging patches, by wintering birds (38 different individual birds belonging to 5 species) in a mixed montane forest of central Spain, considering bird identity (individual, random factor), species and distance to cover (fixed factors), and average diurnal temperature and average light intensity at feeders (covariates). Partial η2: partial eta-squared measuring the magnitude effects of predictor terms.