Fig. 2
From: Cultural conformity generates extremely stable traditions in bird song
Simulated and empirical syllable type frequencies. a Frequency distributions of syllable types found in simulations with different types of bias, illustrating how different aspects of individual learning influence population-levels of diversity. A total of 100 simulations were carried out for each of 6 conditions. In the Control case, individuals had a mutation rate of 0.01 and no bias to learning. In the Low-mutation rate condition, μ = 0.001. In the Demonstrator Bias simulations, v = 2. In the Content Bias simulations, patt = 0.1. In the Conformist Bias simulations, α = 1.2. b Frequency distributions of syllable types found in the empirical data set, from the 6 populations sampled (Conneaut, n = 208, Montezuma, n = 71, Adirondacks, n = 70, Waterloo, n = 74, Horicon, n = 91, Hudson Valley, n = 101), illustrating the consistency found between populations and suggesting a match between the empirical data and the simulations with Conformist Bias
