Bird-safe windows

Ever heard that sickening little thump as a bird hits your window?  It may have flown off but often there's a sad little corpse.  There are ways of making especially large windows safe including by sticking bird silhouettes on them, but an inspiring case study from the USA 
has taken this to an extreme degree.

Closer to home, the RSPB has some advice on preventing collisions and also deterring putty-pecking.