Activity pattern in relation to moon phase evaluated through photo events per 100 trap nights during each moon phase over the course of 13 lunar cycles. Moon phase categories are labeled in order of increasing moonlight (0 = new moon and 4 = full moon). Moon phase categories 1–3 represent data pooled for waning and waxing periods with similar moonlight (e.g. 1 = waxing and waning crescent events pooled). Bars represent the standard error of the mean.