I have a huge picture window in my living room into which this fellow flew. The thud was unmistakable. I found him/her(?) in the mulch, dirt in his mouth, breathing heavily, blinking, wings spread awkwardly. I put on a pair of heavy gardening gloves and scooped him up with a towel, brushed the dirt from his beak, placed him in a box, and waited. His eyes were slits and he was dazed. After about 20 minutes, he began to look around more and more, but still wasn't moving. Then in an instant, he took off and up. I see him many times a day since at the suet feeders! As a result, I have bird-proofed my window with dozens of strands of twine attached to the top and bottom to cut the reflection. It has helped tremendously. Much better than decals.