Question

What are the features of class Aves which help them in flying?

Answer 1

There are several features of birds that allow them to fly. Firstly, their anterior limbs have transformed into wings attached to a well-developed pectoral musculature. Secondly, they have lightweight bones with internal spaces filled with air. These bones are called pneumatic bones. This feature reduces the density of body of the animal, facilitating flight. Thirdly, they have no colon or bladder to accumulate feces or urine. Their excretion is Uric acid which requires least water and least storage place. Lastly, Birds have an aerodynamic body and lungs with specialized air sacs.