It would be pretty useful if we could somehow convince birds to relay our messages using birdsongs -- just use a speaker to transmit a message, encoded in birdsong with some special preamble header, and it will get broadcast or unicast to the desired destination bird that happens to be located near a microphone that receives this message. Could this scheme beat IPoAC? Maybe if we manage to reverse engineer birdsongs well enough, BGP could be ported to birds!