Birds live in trees. Squirrels live in trees. But do you know that some frogs live in trees, too? The tree frogs are hard to find. The frogs can change colours. On green leaves, they stay green. On brown branches, they turn brown. Some tree frogs can change from green to gold or blue.
Tree frogs have legs and wide feet. They have sticky pads （黏性的肉掌）at the ends of their toes. These sticky toe pads keep the tree frogs from falling.
Tree frogs have different colours and marking on their skin. Their eyes are different, too. Some have green eyes, some have gray. Some frogs' eyes are gold, and some are bright red.
The sounds they make in spring and summer are different, too. One frog makes a sound like a dog barking. Another frog makes a loud noise like a snore（呼噜）. There is even a frog that whistles （吹哨）!
