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    This module and collection are included inLens: Siyavula: Natural Sciences (Gr. 4-6)
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Some birds are adapted differently

Module by: Siyavula Uploaders. E-mail the author

NATURAL SCIENCES

Grade 5

Life and way of living

Module 13

Some birds are adapted differently

Activity:

To note how some birds are adapted differently [Lo 2.2]

A - mouse-bird, legs only to hold onto branches

B - eagle or falcon (all raptors), strong claws with which to catch prey

C - duck, just like all birds that swim in water: webs to enlarge the surface.

WHAT IS IT THAT MAKES BIRDS UNIQUE?

  • They are the only animals with feathers as their skin covering. The feathers keep the bird warm and dry. They also help the bird to fly.
  • The front limbs of birds (their ‘arms’) have changed to form wings.
  • Birds have air sacs in their legs that make them light so that they are able to fly.
  • The sternum in the chest of a bird forms a keel to which their strong flight muscles are attached.
  • Birds have a transparent membrane over their eyes so that they can keep their eyes open while they are flying.
  • Their eyes are developed very well. Just think of eagles and falcons.
  • Birds cannot smell and for feeding are dependent entirely on their sense of taste.

INTERESTING FACTS ABOUT BIRDS

  • The ostrich is the largest bird species and lays the largest eggs. Ostriches are bred for their eggs, skin, feathers and meat.The ostrich can kick its enemies very hard and can also peck them.
  • The Blue Crane: National bird of South Africa.
  • The Egyptian goose: The ancient Egyptians regarded this bird as holy.

THE FEET OF BIRDS

In pairs: Study the different types of feet and fit the feet to the birds drawn on page 45. Motivate why you decided as you did by referring to their way of feeding and their way of life.

Figure 1
Figure 1 (graphics1.png)
Figure 2
Figure 2 (graphics2.png)
Figure 3
Figure 3 (graphics3.png)
ABC
Figure 4
Figure 4 (graphics4.png)
Figure 5
Figure 5 (graphics5.png)
Figure 6
Figure 6 (graphics6.png)

  1. ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
  2. ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
  3. ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

It will be a good idea to take a look at the beaks of birds when you are at home to see how they have been adapted to the way in which they eat.

Not all birds build nests.

  1. Name one type of bird that does not build a nest.

_______________________________________________________________

  1. Draw a simple sketch of this bird. Also show where the bird lays its eggs.
Figure 7
Figure 7 (graphics7.png)
  1. Most birds build nests. Why?

_____________________________________________________________________________________________________________________________________________________________________________________________

  1. Choose one type of bird that you can observe in your environment.
  1. (a) Identify the bird.

___________________________________________________

  1. (a) Make a sketch of the bird and its nest.

Figure 8
Figure 8 (graphics8.png)
Figure 9
Figure 9 (graphics9.png)

  1. (a) Can you see both the male and the female? Do they differ in appearance? How? Why?

__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

  1. (a) How are birds generally adapted to be able to look for food and to be able to get hold of their food?

__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Assessment

LEARNING OUTCOME 2: CONSTRUCTING SCIENCE KNOWLEDGEThe learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

We know this when the learner:

  • recalls meaningful information: the minimum requirement is to describe the properties and characteristics of objects, substances and organisms in simple terms;
  • categorises information: creates own category of objects and organisms and explains own rule for categorisation;

2.3 interprets information.

Memorandum

A - mouse-bird, legs only to hold onto branches

B - eagle or falcon (all raptors), strong claws with which to catch

prey

C - duck, like all birds that swim in water: webs to enlarge the

surface

GROUP WORK: Not all birds build nests

1. Cape barn own; rock-kestrel (old nests); most important : plover

3. To lay eggs in at the beginning of spring.

It is seldom used to sleep in.

4c. Why? The male is more conspicuous and can show off to court and impress the female.

4d Birds can fly, they have beaks that are adapted to the type of food they eat and legs with claws that are adapted so that they can sit on brance\hes (when they are looking for prey or eating fruit, for example) and they use them to catch prey. They have well-developed eyes.

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