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