Bats are the only flying mammal. Many bat species are also visually blind, but with echolocation (sonar), they can “see” better than humans.

Evolutionists have zero plausible theories about how bats evolved. However I have heard one rather silly theory that bats evolved from shrews. Did the intermediate species gradually grow really long fingers on their front feet, dreaming of the day when its progeny could gracefully fly? What advantage would really long fingers have? Why did the flaps of skin appear between the fingers? How did the bat learn to fly?

Why did the shrews lose their amazingly complex ability to see, and how could such an amazingly complex ability to use sonar come about? How long did bats live without their sight before they developed their sonar? Bat sonar is much more complex and powerful than any man-made sonar. No one has any idea how this could have evolved.

Atheists accuse creationists of having a God of the gaps—using God to explain the gaps in our knowledge. If an atheist persists in saying bats must have evolved when there is no evidence, or even a theory of how it could have happened, who is really the one with blind faith?