USA, Tel: 800-321-3421 Fitted to your roof. Cummings, John L., Patricia A. Pochop, James E. Davis Jr, and Heather W. Krupa. Im not sure what they feed birds in towns and cities but they seem to create the biggest and worst poop of them all. But once they wear out their welcome and begin wreaking havoc from the balcony, it is time to learn how to prevent birds from perching. The Journal of wildlife management (1995): 47-50. Blot off the peroxide with a paper towel, again trying to not spread it outside the stain. See these two procedures that will help you out, inspectapedia.com/water/Well_Chlorination_Shocking_Procedure.php - shocking the well or sanitizing the well, inspectapedia.com/plumbing/Water_Softener_Cleaning.php- sanitizing a water softener - a similar problem to yours. "Bird-Deterrence Technology for Historic Buildings." You can also use a small bowl and a masher. Inspect: if more bleaching is needed wait for the stain to dry, then repeat the process with a lighter touch of peroxide. I don't wet it because doing so will spread the peroxide of the next step outside the stain area. When you install these devices on your window sills and roof lines, they keep a watch on all bird movement and sound near them. Prevent pigeons and seagulls from landing and roosting on your rooftop. They come in long spike strips which can be affixed to a surface using either screws or adhesive pads. Salmon (2006) points out that some wildlife and pest control chemicals and treatments designed for agricultural use are not appropriate nor safe for home use. Something like the Homescapes Creations is a great choice, the owl shape is also reflective, effectively giving you predator and reflector in one bargain package. 8 Effective Ways On How To Keep Cats Off Window Sills But I suspect the general beige hue is a combination of organic and inorganic airborne debris, perhaps further oxidised by sunlight. I had to do this twice and it seems to have balanced out relatively well (see the before - above, and after photo - below that are taken from a couple of feet away). These spike strips can be used on the overhangs of buildings or even trees at a push and are highly effective methods of deterring birds. I counted somewhere between 8-10 applications in total. For instance, small birds like sparrows can be deterred with netting or wire mesh, while larger birds like crows may require a more substantial barrier such as a fence.