Do all bats use echolocation to find food?

Bats have a sort of 'sonar', which enables them to detect objects before flying into them. The sonar also helps them avoid flying into each other, as well as helping them find their food, which is largely mosquitoes.

They use their echo-location by sending a click sound that is too high-pitched for humans to hear. It bounces back when it hits trees or other obstacles, and the bat then gathers the information and creates a picture of obstacles and prey.