Interesting fact:

Bats smell, hear, taste, feel and see just like people do. The term "blind as a bat" isn't really accurate. Bats have good eyes for seeing in the daylight. However, they do most of their hunting at night. Instead of relying on their sense of sight for night-time vision, bats make rapid high-pitched squeaks called "ultrasounds". These sounds are too high for most people to hear.