For example, one echo they quickly identify is the one they associate with a moth, which is common prey for a bat, particularly a moth beating its wings.
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Related: echo
Prev: So, the echoes from a tree are going to a mass of chaotic acoustic reflections, not like the echo from a moth.
Next: These structures had been detected years earlier by echo-sounding instruments, but they had never been penetrated in the course of drilling.
