Question

Bats can fly at night, because
A. It has strong sense of sight
B. Strong sense of smell
C. It can hear high velocity sound waves’
D. It can produce high velocity sound waves and perceive them.

Answer 1

Hint:- Bat can fly at night, as they use their hearing ability as well as they have ability to produce ultrasonic waves with high frequencies to locate its way and can travel miles by this smarter way. They catch insects at speeds of around 40 metres per second. They use techniques called echolocation.

Complete step-by-step solution:-
Bat uses echolocation technique to locate their prey as well as their way in which they are flying. Echolocation is an advanced navigation technique in which a frequency which is too high pitched to hear by us as humans naturally produce their sounds are reflected in the environment , hitting various objects and returning to the bats as echoes. These echo signals enable bats to form a mental map of its surroundings. On other hand noise from rain, wind and snow disturbs the echo signals making it harder for the bat to form a picture of its surroundings. Bats are more careful of their movements at night than at the day and they are always in the ready position to change their direction when they encounter any danger coming their way. During the daytime the bat uses its visual ability to fly and navigate their way whereas at night-time bats continuously rise and dip in curved flight trajectories. Bats usually fly at night as they love to feed on moths which are highly active at night and also mosquitoes.
So, option D is the right answer.

Note:- There are some interesting facts about bats which we should know about them for better understanding. Bats can eat up approx. 1200 mosquitoes in an hour, they are completely comfortable in finding their food in darkness, they are only flying mammals we have known till now, they also use hibernation techniques in cold weather.