Bayesian analyses were used throughout (see the electronic supplementary
material). The total number of fruits that had peck
marks and the total number of peck marks made by each bird species
per site were examined for variation among forest states using
Bayesian analysis of covariance. For comparison of the handling
rates of real and model fruits, and for the test for direct interference
by ants on fruit handling, we analysed probabilities that fruits in a
display would be handled, numbers of ants per display and peck
marks per display of model fruits.