• Different types of animals have different organs for movement.
• Land animals have four limbs.
• Lizards and crocodile move by crawling, but they do have limbs.
• Snakes do not have legs. They crawl.
Figure 14: Snake crawl
• Some use all four limbs to walk, run or jump while some use only hind limbs, e.g. kangaroo.
Figure 15: Kangaroo use hind limbs for movement
• Birds have wings, which help them in flying.
• The fore limbs of birds are modified into wings, which have feathers.
Figure 16: Birds fore limbs are modified into wings
• Frogs swim with webbed toes, when on land they use hind legs to jump.
• Fishes swim with the help of fins.
Figure 17: Frogs have webbed toes and fishes have fins as an organ for movement
• Tortoise use four paddle-like limbs to push water.
• Penguins use two fore limbs as flippers to push water forwards.
Figure 18: Tortoise have four paddle-like limbs and penguins use two fore limbs as flippers for movement
• Some insects like butterfly have one or two pairs of wings for flying.
• The wings are different from those of birds, as they have no feathers.
• They are made of tiny coloured scales.