Not Like Others
![](https://www.timeforkids.com/wp-content/uploads/2024/05/K1_250124_penguin.jpg?w=1024)
Most animals in groups have similar traits. Some animals differ from their groups. Read these three examples.
Penguins
Penguins (above) are birds. Most birds can fly. Penguins cannot. But they do have wings. Their wings help them swim.
Platypuses
![](https://www.timeforkids.com/wp-content/uploads/2024/05/K1_250124_platypus.jpg?w=1024)
The platypus is one of the only mammals that lays eggs. It lays one or two at a time. It has a beak but is not a bird.
Dolphins
![](https://www.timeforkids.com/wp-content/uploads/2024/05/K1_250124_dolphin.jpg?w=1024)
Dolphins live in water but are not fish. They are mammals. They do not breathe with gills. They have lungs, like other mammals.