From the BBC:
Some say it sounds like a Sonic Youth album. Others have likened the guitar noise to a rock concert soundcheck.
But this particular band is made up of 40 zebra finches jamming on electric guitars and cymbals at the Barbican, in London.
[Celeste] Boursier-Mougenot, who trained as a theatre composer, has placed plugged-in Gibson Les Paul guitars as perches, and upturned cymbals as bird feeders.
As the flock of finches fly around and land on the instruments, wipe their beaks, or use twigs to pluck at the strings, they create a unique and changing soundscape.
Via the Aussie.