Now that you know how to properly and thoroughly clean your windows, you might see an increase in bird-to-window collisions. In fact, studies show that roughly 1 billion birds die after hitting windows each year in the US. Luckily, there are several things you can do to help prevent bird crashes.
Understanding Why Birds Crash
Your windows are invisible barriers that birds cannot see. Worse, they are reflective. During the day, birds crash into windows due to these reflections. They may also be able to view potted plants through the windows and try to reach them while incidentally crashing into the window. At night, birds typically crash into windows while being lured towards them by the light on the other side. Because of their reflective surfaces, birds may also believe they perceive a threat when looking at themselves and attack windows. This is particularly true during the spring mating season.
Solutions
Bird experts recommend several solutions to help prevent bird-to-window fatalities. Before we get into that, however, let us talk about markings. First, markings should be applied on the outside of the window to best reduce reflections. Second, to prevent small bird crashes, experts recommend markings be specifically spaced. Vertical markings should be a maximum of 4 inches apart. Horizontal markings, however, should be only 2 inches apart. For extra small birds, like hummingbirds, markings should be placed on a 2-inch-by-2-inch grid instead.
- Decals
Decals are a fun way to help prevent bird-to-window deaths. Decals, stickers, tape, post-it notes, sun catchers and other window hangs let you personalize your windows while still saving birds. Remember, however, that you need them to cover the entire window or most of the glass surface to prevent deaths. Birds must perceive that these images are too close for them to fly between. In addition, they must be placed on the outside of the glass to be effective since the reflections on the glass surface will obscure decals on the inside.
- Screens and Netting
Mosquito screens are also effective preventative measures. Netting can also be used. It should be installed at least 3 inches from the glass. Small-mesh (roughly 5/8”) is ideal. The netting should be installed tautly to ensure birds bounce off before careening into the window.
- Soap or Tempera Paint
Soap or tempera paint make great, inexpensive solutions and last quite a while. Experts recommend you apply them in a grid pattern or create your own artwork. Remember, if you opt for a grid pattern, rely on the instructions above to ensure you get the most out of your efforts.
- Tapes and Acopian Bird Savers
There are several effective solutions available from companies online as well. ABC bird tape, for example, offers several pre-designed window clings that can be applied to the outside of your windows. They can also be cut to shape for those custom windows that are not quite standard. Acopian bird savers can be bought or self-made. These simple string devices attach to the window frame and freely dangle over the window. Not only do they help establish a grid, they flow with the wind and create a visual disturbance that helps repel birds.
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