[labrax]

Have had this happen in the past and what Nebe says works - there are stickers that you can put on your windows - think some of them look like spider webs too - so that the birds recognize there is something there and don't do an evil kneveil into the glass. Unless you are in a remote area - I am sure you are not alone in the use of lawn chemicals, so I wouldn't draw the cause and effect relationship with your use of lawn fertilizer this year. As far as contacting animal control or health department regarding bird flu tie-in. The robins and the cardinals are not long range migrants and i doubt they would have been tainted with this flu. Plus, we are not on the right migration flyway for birds that may have it in Asia.