As much as some people may despise them, grackles are a protected species in Texas. This means that it is illegal to shoot them or harm them in any way. Unfortunately, this doesn't stop some people from trying to get rid of these birds by any means possible. If you have a problem with grackles, the best thing to do is call your local animal control office and ask for help. They will be able to give you advice on how to deal with the situation in a safe and humane way.