Do Bats Use Their Ears To Catch Food?

Yes, indirectly.  Bats use echolocation to see in the dark.  They emit high-pitched sound waves, which bounce off of physical objects nearby and come back to the bat's ears.  The bat's brain translates the tiny variations in the way the sound comes back into a physical map of what's in front of the bat.  If the bat senses an insect in front of it, it can use echolocation to catch it.  So it catches food in its mouth, but it finds it with its ears.