Make Your Own

Acopian BirdSavers

‘Quick Guide’ to make your own Acopian BirdSavers

  • Use 1/8″ diameter, dark colored, paracord (parachute cord).
  • Attach the paracord on the outside of the window, above the glass.
  • Space the vertical hanging paracord anywhere from 3.5” to 4.25” apart.
  • If you are concerned about wind blowing the cords, the bottoms of the  cords can be attached below the glass, although many people like the effect when the cords stop about 2” above the bottom of the glass.

Volunteers at the Chincoteague National Wildlife Refuge installed Acopian Birdsavers on windows to prevent bird mortality. Photo credit: USFWS

See Acopian BirdSavers FAQs

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]) hanging four and one quarter inches (4-1/4˝) apart. We have been using olive drab colored parachute cord for many years and it has proven very effective. The results of tests conducted by Dr. Dan Klem, confirm our own conclusions that Acopian BirdSavers with olive colored parachute cord are very effective in preventing bird-window collisions. We are fairly certain though, that any dark color, or for that matter probably any color or any type of cord, will be just as effective as the olive drab color paracord. Any method you use to hang cord in front of the glass will significantly decrease the number of birds that are hitting a problem window. The cord 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 cord 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’.

In the version above, the vertical ‘hanging cords’ are suspended from a piece of moulding that has holes drilled in it for the ‘hanging cords’ to hang from. The holes are spaced 4.25” apart.

In the version above, the vertical ‘hanging cords’ are suspended from wire loops that are attached to a piece of moulding every 4.25”.