Tweeter Challenge?

[Blutarsky]

http://earthsky.org/earth/worlds-most-extreme-hearing-animal-its-a-moth?utm_source=EarthSky+News&utm_campaign=315b4eb2da-EarthSky_News&utm_medium=email&utm_term=0_c643945d79-315b4eb2da-393661329

Blutarsky

[Dark Ranger]

Fascinating! Thanks for sharing, Blutarsky.