Acopian BirdSavers need to be installed on the outside of the window. This is so that birds flying towards the window will see the cords, avoid them, and therefore not fly into the glass. Acopian BirdSavers consist of 1/8 inch diameter nylon cords (olive drab colored parachute cord [paracord], available in many places) hanging four and one quarter inches (4-1/4˝) apart. Any method you use to achieve this will significantly decrease the number of birds that are hitting a problem window. The paracord can be spaced closer together than 4-1/4˝ if you are concerned about the possibility of any smaller birds trying to fly between the cords although this very rarely happens. 4-1/4˝ spacing seems to be a very good balance between the visual aesthetics of the paracord on the window and the protection of the birds. Birds sometimes do fly into even solid objects! (See FAQ – “Why do BirdSavers prevent birds from flying into windows?”)
The bottoms of the cords don’t need to go all the way to the bottom of the glass. Most people like the look of the cords when they stop about 2 inches above the bottom of the glass. (See FAQ – “Why don’t the bottom of the BirdSavers cords go all the way to the bottom of the glass?” and “Why aren’t the paracord lines attached at the bottom? Don’t the lines get tangled when it’s windy?”)
Below are some examples of various ways to attach the BirdSavers cords to a window. What you will use to support the vertical “hanging cords” depends upon your particular window’s situation.
If you decide to order Acopian BirdSavers, instead of making your own, the top attachment “support cord” will be made of parachute cord. These types of BirdSavers are a little more difficult to make than any of the other versions shown on the website.
You will achieve a 90 to 100 percent reduction in bird-window collisions by installing Acopian BirdSavers.
In the photo above, on the left, there are 3 vertical hanging cords hanging from an aluminum support strip. On the right, there are 3 vertical hanging cords hanging from a ‘support cord’ made of parachute cord that is suspended from small aluminum tabs. The horizontal support structures are attached to the house with small pieces of velcro.
In the version above, the horizontal ‘support cord’ as well as the vertical ‘hanging cords’ are made of parachute cord that is suspended from two small aluminum tabs. There is also one very small aluminum tab in the center of the ‘support cord’.