Alexa and the other children at her rural school in Costa Rica have a special project: they are raising American Crocodiles and returning them to the wild. End notes discuss the physical characteristics and conservation of crocodiles.

Dr. Brady Barr is a reptile expert and television personality. In over 20 years, he's traveled to more than 80 countries for National Geographic Television to host over 100 wildlife documentaries. Among his many notable achievements, Brady was the first person to ever capture and study all 24 species of crocodilians in the wild. He is the author of multiple children's books about reptiles, a frequent contributor to National Geographic Kids magazine, an ambassador for Nat Geo's Young Explorers Program in Asia, and an educator at the National Geographic Explorers Club for Kids.