When species hybridise

Species are often thought of as discreet and separate from one another. However, hybrid zones often form between closely related species, providing the opportunity to test many evolutionary hypotheses. In this episode, we talk to Dr Henrique Batalha-Filho (Universidade Federal da Bahia, Brazil) and Dr Marcos Maldonado-Coelho (Lund University, Sweden) about their work characterising a hybrid zone between two spinetail bird species in the Atlantic rainforests of Brazil... we also hear from the birds themselves. Associated article: https://www.nature.com/articles/s41437-019-0256-5