They breathe with gills when young, but late develop lungs.
They have fur or hair.
They born from their mother's womb.
The penguins are...
The frogs are...
They have scales and a dry skin.
They live in water.
They breathe with gills.
They have two legs.
They have scales and fins.
The sharks are...
Their babies drink milk.
They have a moist skin.
The crocodiles are...
They have beak and two wings.
Some of them have no legs.
The dolphins are...
Most of them can fly.
They have feathers.
The elephants are...
