Many people wonder why birds crash into their windows or simply peck at them. Birds don’t understand the concept of glass or it’s reflective properties and may just see it as an extension of the sky. This behavior can greatly injure a bird or kill it. If a bird crashes into your window and seems stunned, you can put the bird in a shoebox with air holes and place it in a quiet, dark place for about an hour. Sometimes all they need is a little bit of time to recuperate. After this time, you should try and release the bird and see if it can fly away on it’s own. If it cannot, and the bird still seems disoriented or has any obvious wounds or other injuries you should seek help from a local wildlife rehabilitation center. Don’t attempt to care for the bird yourself as this is illegal.
Birds are often seen pecking at windows and car mirrors during the breeding season. Males are full of testosterone at this time of year and become very territorial, and will often mistake their reflection for a rival male. This behavior can be discouraged by making your windows less reflective by closing curtains or shades, or by placing decals on your windows. Decals are sold specifically for this purpose and come in hawk-shaped silhouettes or something more subtle like butterflies or snowflakes. Many are treated to reflect back ultra-violet light that acts as deterrent to birds making contact with the window. Although the birds can easily see these decals, they appear almost transparent to the human eye. You can also try breaking up the reflection by applying strips of masking tape in a criss-cross pattern to your windows, or by drawing lines on them with a bar of soap. Adding a screen, net or other barrier outside the window, and moving bird feeders, birdhouses and bird baths away from windows also helps.
Birds attacking car mirrors can be discouraged by simply covering the mirrors when your car is not in use. Potholders or plastic grocery bags with a rubber band to hold it in place work well. If window reflection is attracting them to your car, you might consider investing in a car cover.