Page 263 - New Medley 5 Semester 1

l Butterflies, houseflies, bees and

mosquitoes move by flying with the Knowledge Zone
The fastest flying insect,
help of wings. These animals fly from the dragonfly, can cover

one place to another. 29 kilometres in one hour

l Birds fly with their wings. Wings are in short bursts of flight.
modified forelimbs which are covered

with feathers. While flying, birds move
their wings downwards and backwards.

This lifts the birds upwards and makes
them move forwards.

Birds change the direction of their Housefly Butterfly Bird

flight with the help of their tail. The
tail feathers and the hindlimbs help

them in landing. Birds have hollow
and light bones which make their

body light and help them in flight.
Ostrich Emu
l Birds such as ostrich, emu, rhea,
cassowary and kiwi are flightless birds. They cannot fly because their

bodies are heavy and their wings are very weak. But, they can run very
fast with the help of their strong hindlimbs.

1 • Critical Thinking

Strike out the wrong word.
1. Amoeba breathes through body surface/gills.

2. Insects breathe through lungs/spiracles.
3. A Paramecium moves with the help of cilia/legs.
4. Turtles swim with the help of flippers/paddles.

5. An emu is a flightless/flying bird.

Adaptations for Feeding

Different animals eat different types of food. On the basis of the type of food
they eat, they are divided into different groups. Animals have their teeth and

digestive system adapted according to the food they eat.

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