crocodileostrichpenguinwhalesharkhippozebralionbutterflygiraffehummingbird reptile 爬行动物 mammal 哺乳动物 insect 昆虫 crocodile 鳄鱼 ostrich 鸵鸟 penguin 企鹅 whale 鲸 shark 鲨 hippo 河马 zebra 斑马 lion 狮子 butterfly 蝴蝶 hummingbird 蜂鸟 giraffe 长颈鹿 wing 翅膀 Mammals • Mammals bodies are covered with hair or fur.• Mother mammals feed milk to their babies.• Mammals have warm blood Birds • All birds have feathers.• All birds have two wings.• Mother birds lay eggs. Reptiles • All reptiles have scales.• Mother reptiles lay eggs.• Most reptiles have four legs. A snake is a reptiles with no legs.Mammals: wings milk scales feather eggsReptiles: scales milk hair wings featherBirds: milk feathers scales seaMammals: wings scales feathers eggsReptiles: milk hair wings feathersBirds: milk scales seamilkscalesfeathersFirst, I have wings. Second, I have feathers. What kind of animals am I ?You are a bird!First, I have scales. Second, I lay eggs. What kind of animals am I ?You are a reptiles!First, I have hair. Second, I have warm blood. What kind of animals am I ?You are a mammals!