ANIMAL WORLD (PART 7)

Good morning students!

Hope you have revised the previous topics and completed the work.

In the previous blogs we learnt about the movement in aquatic animals and insects.

In today's class we will learn about the movement in birds, reptiles and mammals.

Let's begin.

MOVEMENT IN BIRDS

Birds fly with their wings which are actually their forelimbs.

They use their hind limbs or legs to:

• Land on the ground
• Walk, run, hop, perch
• Scratch the ground
• Catch their prey.

               Parrot                 Indian roller                                 

• The wings of birds are special as they have feathers. 
• The wings are attached to the breast bone. 
• Strong muscles help birds to flap their bones are hollow, making it easy for them to rise in the air and fly.

Flightless birds

 All birds have wings but some birds are unable to fly due to their large size.

Ostrich,                  Emu 

                      kiwi are flightless birds. 

Their wings are too weak for them to be able to fly.

MOVEMENT IN REPTILES

They have scales on their bodies and they move by crawling on the ground.

Crocodile, 

lizard, 

chameleons and turtles have short limbs to help them crawl. 

Snakes are legless reptiles, they do not have limbs.

•  They crawl with the help of scales or plates on the underside of their body 
• Strong and flexible muscles of the snake expand and contract and thus help them to move.

MOVEMENT IN MAMMALS

Mammals have four limbs. 

Cow  

camel 

Mammals use their four limbs for walking and running.

Humans 

They use their HIND LIMBS or legs to stand and to support their body. That is why, unlike other animals, humans stand straight on their two legs and have an erect posture. They use their legs for walking and running.

They use their FORELIMBS for holding or catching things.

Mention the name of the chapter and date in the index and attempt the following questions:

Q1. What features of a bird's body help it to fly?

Q2. Describe movement in snakes.

That's all for today!