The fascinating evolution of REPTILES and AMPHIBIANS is rooted in their unique relationship with water. Species from these collections have lungs but also take in oxygen thru their skins.
Amphibians emerge initially as larvae, from the laying of hundreds or thousands of eggs, have gills and require a water environment. As they grow, most develop limbs, the ability to survive on land, eating the plants, insects in and around watery areas. Most have smooth moist skin.
When reptiles, which usually hatch from the laying of a dozen or fewer eggs, are born, they look like miniature versions of the adult species. They develop scaly exteriors and strong, protective vertebrae enabling some like alligators and snakes to move quickly and grow to large sizes.
Both reptiles and amphibians are cold blooded, meaning their body temperatures can fluctuate depending on their environment and the season.