The way animals move.

Another classification of animals could be by the way they move. Animals can:

• Walk: 
• Almost all mammals move walking. We have to except some aquatic mammals, like dolphins, sharks or whales; and the bat, maybe the only mammal who can fly.
• Some amphibians
• Some birds.

• Fly:
• Almost all birds move flying. Some birds, as for instance the penguin cannot fly. We have mentioned before the bat (a mammal).

• Swim:
• All fishes move swimming.
• Some aquatic mammals move swimming.
• Some anphibians can swim. 

• Crawl along the ground:
• Some anphibians move crawling along the ground. They do not have legs

Most part of information and images are taken from the book: Essential Science 4. Science, Geography and History (2006). Santillana Education, S.L / Richmond Publishing