Look Ma, no ears! Teensy spiders hear with organ on their legs

Ogre-faced spiders hang from their webs, and like gymnasts, they flip backwards to snatch flying insects from the air. To hear their prey coming, the spiders “listen” for the flap of tiny wings using a special organ in their spindly legs, a new study has found.

The organ looks like a patch of parallel slits cut into the spider’s exoskeleton; located near the tip of each leg, each slit measures between 0.0000003 and 0.000007 inches (10-200 nanometers) in length. These tiny slits contain nerve cells that detect minute changes in pressure caused by sound waves rippling through the air; the organ then sends this information to the brain. 

Source link

#ears #Teensy #spiders #hear #organ #legs