Neotropical crocodiles inhabit a broad geographic range with populations spanning from coastal, inland, and insular locations. In new research, scientists discovered a remarkable genetic diversity for the group and identified two new insular species: one living on the island of Cozumel and the other on the atoll of Banco Chinchorro, both off the Yucatán Peninsula. An adult American crocodile (Crocodylus acutus) at La Manzanilla, Jalisco, Mexico....