Figure 3.

Predicted reductions in the number of visits made by adult male ruby-throated hummingbird competitors (NVC) when focal males' spatial concentration goes from 0.0 to 1.0 in Cleveland County, Quebec (Canada), 2007–2009. The X axis represents NVC when spatial concentration is 0, that is, when the focal individual is presumably absent from the feeder and when competitors have a free access to the feeder relative to the focal individual. Values were obtained using the model-averaged best linear unbiased predictors (BLUPs) of the linear mixed models listed in Table 1 as individuals were treated as random effects for the intercept and the slope characterizing the effect of spatial concentration. Other numeric variables were fixed to their mean value, and factors were fixed to their reference level.