Reply to Andrew Brower's critique of the evidence for hybridization among Heliconius butterfly species in the wild

Abstract

Andrew Brower recently published a long article in this journal that seeks to dismantle evidence for hybridization between species of Heliconius butterflies. The main evidence that Brower criticizes here is given in two papers published by my colleagues and myself in 2007. In this reply, I briefly defend our evidence, and at greater length provide additional background information to help establish the credibility of the evidence even more firmly than previously.