These Moths Use Their Genitals to Fend Off Bats—but Not in the Way You Think. They Emit Ultrasound to Scramble the Predators' Sonar
New research suggests male hawkmoths have three distinct anti-bat, ultrasound-producing systems. These may have evolved independently up to seven times between 5 million and 30 million years ago
We haven't written up this one. Smithsonian has the full story — the link below goes straight to it.