www.chinaphonearena.com

Woodpecker drumming signals wimp or warrior

Instead of a distinctive song, woodpeckers bang on trees with their bills to create a sound called drumming. In a new study, researchers tested how woodpecker pairs perceived drumming to see how it influenced territorial interaction and coordination of defensive behavior.


http://feeds.sciencedaily.com/~r/science...163603.htm

I clicked because I thought it was an article on the Russian woodpecker radar system... go figure.

One thing leads to another. Now I need to read about Russian woodpecker radar.