image: This is the common European Toad (Bufo bufo), an optimal range-expansion phenotype that has a large distribution range in Europe. This image relates to an article that appeared in the February 5, 2010, issue of Science, published by AAAS. The study, by Dr. I. Van Bocxlaer at Vrije Universiteit Brussel in Brussels, Belgium, and colleagues, was titled, "Gradual Adaptation Toward a Range-Expansion Phenotype Initiated the Global Radiation of Toads." view more
Credit: Image courtesy of Bert Willaert