How To Build A Wooden Swing Set How Can I Prevent Robins From Building A Nest On Kids Swingset?

How can I prevent robins from building a nest on kids swingset? - how to build a wooden swing set

Is there a way to prevent or deter these birds build a nest, where my children play. I distant 3 nests in the last few weeks. Swing is made of wood with a club that has a high ceiling. The birds build on the porch in one of the supports.