Some beetles use natural jammer systems against bats.

"Recent research reveals that tiger beetles emit ultrasound in response to bat echolocation not as a warning of their toxicity but to mimic the defensive signals of noxious moths, a strategy that confuses bats. This behavior is observed only in nocturnal tiger beetles, highlighting a sophisticated form of evolutionary adaptation. Credit: SciTechDaily.com" (ScitechDaily, Ultrasonic Illusions: How Tiger Beetles Use Mimicry to Outsmart Bats)

In nature, some systems or behavior can have many purposes. Tiger beetles send ultrasounds against the bats. The purpose of those ultrasound signals is to make the tiger beetle look like a noxious moth.

Or its purpose can tiger beetles call other predators like owls or cats to the area. And owls and cats eat bats. This kind of behavior is detected in almost all other species. When some small animal faces deadly predators, it screams and the purpose of the scream is to call bigger predators on the place.

"Many tiger beetles that are active at night produce a high-pitched, ultrasonic warning signal to ward off bats. Credit: Harlan Gough" (ScitechDaily, Ultrasonic Illusions: How Tiger Beetles Use Mimicry to Outsmart Bats)

And those bigger predators can attack the smaller predators. This means that the attacking predator must turn its notice away. This ultrasound system may have many purposes. Maybe the tiger beetle tells the bat, that it noticed it. Those beetles are poisonous. But an interesting thing is that the tiger beetles use that ultrasound only at nighttime. So that means its primary use is against bats that hunt using ultrasound.

The tiger beetle can also use the counter sound for jamming the bat's sonar. At this point, the counter sound can break the bat's ultrasound cone, which makes it harder to use its sonar.

This kind of active jammer system makes the bats unable to estimate the range of their food. And that thing can make tiger beetles survive against the bats. In the second version, the counter waves make the tiger beetle seem closer than it is. And that thing can make a bat bite at the wrong time. That gives the tiger beetle the possibility to escape. So maybe this ultrasound system has many purposes. And it's a good example of natural adaptation.

https://scitechdaily.com/ultrasonic-illusions-how-tiger-beetles-use-mimicry-to-outsmart-bats/

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