What about some very cheap devices (from Asia? sure) you could get on ebay and have them set with your bitcoin address of choice that would be pulsing that bitcoin address in Morse code, or any other 34 alphanumeric chars, for that matter.
People would film the birds at night with their iphones and cypher the messages or bitcoin addresses, and if they liked the idea because they love animals and reckon they would feel we were giving them more importance, or for any other reason, like they just like it and have fun trying to find out and donating to the bitcoin addresses that was providing it.
The devices could use the kinetic energy to feed the eletricity for the lights to pulse (dynamos, like bikes use) and it would have just a small battery for the microcontroller of it.
You could love the bird sending tiny satoshis whenever you would see it again.
http://i45.tinypic.com/1zdvh2p.pnghttp://upload.wikimedia.org/wikipedia/commons/2/2e/BIRDS_WITH_FLASHLIGHTS_LIKE_BIKES.svgWhat do you reckon?
Let the birds feel a bit more important. Let them be given a bit more attention and importance.