Phylogeography, poisonous frogs.
A phylogeographic image of poison frogs lineages from South America. Maps on the left show the main biogeographic regions as they change through time and the image to the right shows the frog lineages in context of their biogeographic origins.
By Santos JC, Coloma LA, Summers K, Caldwell JP, Ree R, et al. [CC-BY-SA-2.5 (www.creativecommons.org/licenses/by-sa/2.5)], via Wikimedia Commons