1. General: "Methods Of Bird Control: Advantages and Disadvantages" is a good short overview and assessment of the various types of bird control techniques in use today. Available on the website of the US General Services Administration.
2. General: "Pest Birds" by Nick Gromicko is a good short general introduction to birds and the building issues they cause. Found on the website of the International Association of Certified Home Inspectors.
4. Modified Bitumen: Bird droppings and modified bitumen roofs: "Enemies of the Roof" by John W. Wells discusses roof damage and maintenance issues. Available in the March 2007 issue of Interface Magazine.
5. Manufacturers: Bird deterrent product manufacturers can be found here.