An article in the NY Sun highlights the NYC Audobon Society's efforts to prevent birds from flying into building windows. The NYACS "will attempt to determine what combination of conditions, such as types of glass and levels of nearby vegetation, lead to the most bird collisions." Many tall buildings have turned off their lights at night during winter migration, and now, it seems that some new buildings are trying to prevent untimely bird deaths: The Freedom Tower consulted an industrial ornithologist for its design (the World Trade Center had a history of bird deaths) - no word on whether he'll be called upon again for the other World Trade Center towers.
If you find an injured bird, here are instructions on what to do.
The NYC Audobon's website has results from its research at the Morgan Mail site - they even have photographs of the rare birds found dead outside!