"Ultraviolet patterns can make window glass visible to birds, thus preventing fatal collisions. However, it has now been shown that such windows are not likely to work for all species, but only for birds like small passerines, gulls and parrots, who have a special type of colour vision. For birds of prey, geese, pigeons and crows, these patterns should be difficult to detect."
These conclusions appear today
in an article by Olle Håstad and Anders Ödeen in PeerJ (http://m.phys.org/news/2014-10-window-glass-visible-birds.html).
The article can be found here: http://dx.doi.org/10.7717/peerj.621