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Takeaways:
- Researchers from the University of Southern Denmark have found that echolocating bats can make sounds spanning around seven octaves.
- They found that these bats use a specific structure in their voice boxes known as false vocal cords to lower the frequency of their calls.
- The bats make these sounds when they fly in and out of a densely packed roost.
Click here to view the original web page at: Bats grunt like death metal singers to communicate with roostmates
