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. 2013 Jun 7;280(1760):20123087. doi: 10.1098/rspb.2012.3087

Figure 2.

Figure 2.

Predicted mean hourly feeder visitation rates per individual based on a generalized linear mixed model (GLMM). Feeding activity generally increased throughout the day, with a sharp decline in activity as sunset approached for three of four species. Results for (a) black-capped chickadee, (b) tufted titmouse, (c) white-breasted nuthatch and (d) house finch.