10/31/2026
🎃Happy Halloween and 🦇
The spookiest sounds of Halloween may be the ones we can’t hear, like the those represented in this image capturing the climactic moment of a bat on the hunt.
Bats send out high frequency sounds and read the returning echoes to find their way in the dark. Most of these echolocation sounds are too high pitched for humans to hear. This sonogram is a visual representation of echolocation calls made by an Eastern red bat (Lasiurus borealis) eating an insect at Stones River National Cemetery.
The call pattern has a “bouncy” shape, which is common for eastern red bats as they search for prey. A little after 0.2 seconds, the bat begins a “feeding buzz.” This faster series of calls helps the bat locate the insect and learn more about it. From about 0.5 to 0.7 seconds, the bat was likely eating the insect. Around 0.7 seconds, it began searching for another meal.
Scientists can often identify bat species by looking at the call’s frequency, duration, and pattern. However, many bat species have similar calls, so they can sometimes be difficult to identify correctly.
More information about Bats of TN: https://www.tnbwg.org/more/bats-of-tennessee
University of Tennessee Image