One of our favorites is the Acopian Bird Saver made of paracord that looks great and is easy and inexpensive to make. Their website has detailed information including how you can make one or order one to use year round or during critical migration periods.
If you order or make one of these to use on a home, office, or building application, let us know! We will add your photos to our website and Facebook page. We love to see the steps people take to protect our feathered friends!