Question

The bats can fly at the dark because-

Answer 1

Since, they use their hearing ability to produce ultrasonic waves with higher frequencies to locate their way and can travel miles by this smarter way , therefore, bats can fly in the dark. Around 40 meters per second, they catch the insects at speed. They use techniques called echolocation.

Complete answer:
To locate their prey as well as their way in which they are flying, bats use the echolocation technique. 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. To form a mental map of its surroundings, these echoes enable the bats. On the other hand noise from the rain, making it harder for the bat to form a picture of its surroundings, wind and snow disturbs the echo signals. Bats are more careful of their movements in the dark than at the day and they are always in the ready position to change their direction when they encounter any danger coming their way. The bat uses its visual ability to fly and navigate their way during the day time, whereas, at the dark times bats continuously rise and dip in curved flight trajectories. As they love to feed on the moths which are highly active in the dark and also the mosquitoes also, so, therefore the bats usually fly in the dark.

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 and their food in the darkness. They are the only flying mammals, we have known till now, they also use hibernation techniques in cold weather.