Window Strikes from Birds Can Be Stopped
The relationship between windows and birds comes in different degress of deadliness. Sometimes it’s just a quick peck of bird meeting glass. Others it is a tiny series of small crashes and a light flutter of many wings. The worst, however, are the jarring impacts that resonate throughout an entire house, leaving you and your family members startled and often crippling or killing the bird. Sadly, these impacts are far more common than you might think. In an article for Audubon magazine, David Malakoff cited that in North America, window strikes kill between 100 million and 1 billion birds annually. According to an NPR story, Professor Daniel Klem of Mulhenberg College things that Malakoff’s estimate is too conservative, and that the real number easily exceeds 1 billion birds in the United States alone.
Why Strikes on Windows Occur?
It’s hard to know for certain exactly why window strikes happen, but observation has granted some measure of insight. The first, and seemingly most common, rationale is that birds simply cannot see glass. The transparency of the glass makes the window look open, and this is often complicated further by a window on the opposite side of the house. This causes what is commonly referred to as the “tunnel effect,” meaning that the bird believes that the two windows lack glass and thus represent a clear tunnel to fly through.
The other primary reason for bird strikes seems to be reflections. Windows in homes and office buildings sometimes give a good reflection the area around them. So, while the house or building certainly appears to be a house or building, the windows look more like wooded areas which are perfectly safe for flying.
Ways to prevent window strikes
There are a range of possibilities for preventing window strikes. The most effective method is to remove a window, or to completely cover it with something opaque and non-reflective like wood or cardboard. Sure, taking out a window is a big deal and not very practical for most home owners. Thankfully, with a little understanding as to why birds strike windows, home owners can reduce bird strikes with more people-friendly methods.
Covering Windows
While boarding up windows is an extreme solution, it does prove a point. Putting something between the window’s glass and the outside world can both alert a bird to a physical object and prevent reflection. The last line for many people seems to be when such a covering starts blocking views. Home owners have several options like summer storm screens, to heavier plastic “shade cloth” and even the commercial CollidEscape film, all of which help to remove transparency and restrict reflection to various extents.
Silhouettes and Obstacles
Another tactic is to prevent the bird from coming near the window. Some homeowners put blockades, such as a tree or bird feeder, in front of a window, particularly windows that are struck with some frequency. If you notice that your bird feeder is causing birds to strike your window, then moving the feeder further from your house would be a prudent move. Another popular method, which works to varying degrees, is to intimidate birds away by way of statues and silhouettes. A statue of an owl, or a cut out made to resemble a flying hawk can cause an errant bird on a collision course with a window to change course.
The Happy Medium
For many home owners, window strikes are infrequent happenings and thus can easily be remedied by merely moving a bird feeder or placing a hawk silhouette in a tree. For others, other more permenant efforts must be used. Lucily, for most people in areas with a lot of bird traffic, there is a happy compromise. Make part of the window more obvious with the application of custom window decals or stickers. PUtting decals and stickers on a window makes the glass in the window less transparent and can disturb reflections, minimizing two of the reasons why birds hit windows. Special sticker creating techniques can even make these stickers nearly-invisible to humans while birds staying perfectly visible to birds. Such stickers benefit birds while doing very little to detract from the value humans derive from said windows.
Custom Stickers used to prevent bird strikes can come in a variety of shapes and sizes. Homeowners can use of the many seasonal options such as snowflakes for winter, leaves for fall and holiday images. These stickers can even be made in the images of predatory birds, thus mimicking the silhouette effects and adding to the sticker’s effectiveness.
The big key to stopping bird strikes to your windows is to change it up. This can be done through changing the locations of physical things - like bird feeders and trees - thus forcing birds to alter their flight paths. Or, it can be done though intimidation, via silhouettes of predators. Or, a home owner can change the bird’s perception of the actual window. Stickers, whether they are human-visible or not, make windows more obvious to birds, while screens and covering cloths negate the qualities (reflections and transparency) that make windows harmful to birds in the first place. The question for home owners is to determine which window strike prevention method works best for you.













