They make their homes in the shadows, under logs and leaves. They bask in the sun to warm themselves. They lay eggs or bare live young. Their chorus often sounds the arrival of spring. Still wonder what they are? Frogs and snakes, salamanders and lizards, turtles and tortoises, alligators and crocodiles, and more. Amphibians and reptiles are declining across the world as they face a number of threats. The National Park Service studies these species and preserves the places they call home. Discover these unique animals.