Apparently bats hunt moths using sonar, but moths have evolved sonar-jamming techniques that make them invisible to bats, but bats have evolved counter-jamming techniques to make moths visible, and all of this sonar war happened long long before humans stumbled upon these same techniques for radar:
"The jamming of bat sonar by certain tiger moth species has been confirmed. This can be seen as nature's equivalent of radar jamming. Similar to human ECCM techniques, bats are found to change their emission lengths to defeat jamming."
https://en.wikipedia.org/wiki/Radar_jamming_and_deception#Jamming_in_nature