Attaching glass, sheet metal, or other very smooth-surfaced materials to the potential nest site can inhibit swallow nesting. A fresh coat of paint producing a slick surface may discourage nesting. Removing old nests and painting the area may discourage nesting the following year. Other methods have shown little success or are unproven against cliff swallows. Material A partial list of sources of supply for netting and metal or plastic projectors is given below.
Netting is also available at many hardware and farm supply stores.
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