Effect of number of visitors on the behavior of penguins as a group in Fota Wildlife Park: a comparison of penguin behavior in the presence of no visitors (n = 164), 1–10 visitors (n = 349), and >10 visitors (n = 147). Mean behavior is based on data from each scan. * indicates a significant correlation (p < 0.05); ** indicates a highly significant correlation (p < 0.01).