Research into the sonar of bats has been a source of fascination to scientists. For example, it has been discovered that in some instances the night-flying tiger moth, Cycnia tenera, which can become the prey of bats, has a system of evading, or jamming, bat sonar by emitting bursts of ultra-sound. The bursts effectively startle the bats, and drive them off.
In reference to the vines of Cuba that summon bats by echoing sonar, Marc Holdereid, mentioned earlier, said to staff at National Geographic Magazine that the teams have looked at bat-pollinated plants and found amazing things. “We are expecting to find many more. I think the acoustic world out there is just waiting for us."
vine photo --
A Marcgravia evenia plant with flower buds --news.nationalgeographic.com
Monophyllus bat photo — Wikipedia