human
I've heard that there are many different types of frogs. What are the different types of frogs?
assistant
The most common type of frog is the tree frog, which has smooth skin and lives in trees. Other types of frogs include the cane toad, which has rough skin and lives in water; the bullfrog, which has a large head and lives on land; and the leopard frog, which has spots and lives in water.