Question

Birds do not fatigue during flight?

Answer 1

Birds do not fatigue easily as
They have less body weight

Answer 2

Answer:  

Birds do not fatigue during flight.

Explanation:

The unique characteristic feature of the birds is its ability to fly. It has many certain adaptation which ensures a tired less flying.

They are as follows:

• The main reason for fatigue is less supply of oxygen. In order to keep up the oxygen level the air sacs present in the lungs plays a vital role. It facilitates efficient use of oxygen.
• The pneumatic bones present in the birds helps them to feel light during flying. This also ensures that birds do not fatigue during the flight.