Hello Peggy,
Below is one link to window decals to prevent bird strikes. I have
bought from Duncraft in the past, and they have been a reliable
company. Or just go to Amazon and search for "bird strike window
decals." There are other products which may work.
http://www.duncraft.com/Window-Strike-Solutions?view_all
I have a set of stickers/decals which I have used at two different
houses. The shapes cling without glue and can be removed easily. They
do seem to work, but it is necessary to apply several of them to areas
birds hit. One sticker on a window doesn't seem to do any good. You
might need to move them around until you find the best location to keep
birds safe.
Barbara Farron
Lakeridge/Woodbridge VA