Figure 3.

Distribution of beak sizes in G. fortis at three different sites on Santa Cruz Island in 2004. At El Garrapatero, (d) small and large morphs are both common and (a,d) intermediates are relatively few. At Academy Bay, (e) small and large morphs are both common and (b,e) intermediates are less rare. (c,f) At Borrero Bay, the large morph is rare. These data are from Hendry et al. (2006). (a–c) The white sections on the histograms and (d–f) the open circles on the graphs represent the ‘intermediate beak-size class’ omitted from the genetic analyses (§2).