“german artist julius von bismark teamed up with swiss photographer julian charrière in this controversial live art installation: a “pigeon-apparatus” was created for the Venice Architecture Biennial on a city rooftop. When the birds flew into it, they were trapped and airbrushed various colors in non-toxic paint before being released back over the city.”
thesometimeszoo.wordpress.com 
Very nice, as long as the pigeons not were too distressed. A couple of years ago I found a Danish site about pigeons http://www.raceduen.dk/, and was stunned by how versatile their lok can be… Very fashionisa 🙂 http://www.raceduen.dk/galleri_tumlinger.htm