Bird Window Hits
There is now a site to report window hits. Dr Klem and his Lab group at Muhlenberg College, PA, are doing a study and would like your information: Acopian Center For Ornithology
Excerpt from "SHEET GLASS: AN INVISIBLE AND LETHAL HAZARD FOR BIRDS
":Approximately 25% or 225 species of birds in the United States and Canada have been documented striking windows. The species not recorded as window-kills are those that typically do not occur near human dwellings. The sex, age, or resident status of a bird in any locale has little influence on their vulnerability to windows. There is no season or time of day, and almost no weather conditions during which birds elude glass. Transparent or reflective panes of various colors are equally lethal to birds. Strikes occur at sheet glass of various sizes, heights, and orientation in urban, suburban, and rural environments, but birds are more vulnerable to large (>2 m2) panes near ground level and at heights above 3 m in suburban and rural areas. Strikes are more frequent during winter when birds are attracted to feeders in larger numbers than at any other time of the year, including the spring and fall migratory periods when glass casualties typically attracts the most human attention because they are often more visible on sidewalks or around workplaces.