Paint or put tape on your windows.
If you would like a temporary and inexpensive solution, you can paint stripes on your window with tempura paint. According to the American Bird Conservancy, most birds will avoid windows with one-quarter-inch wide, white, vertical stripes spaced four inches apart, or one-eighth-inch, black, horizontal stripes spaced one inch apart. You can also paint creative designs like squiggles and flowers if that’s more fun for your family. Just keep the same general idea in terms of spaces between the designs.