are never good for birds which is one reason David Sibley has been experimenting with a novel way to make birds aware of his windows (though he concludes that there is a more effective method). But sometimes a window strike can result in an amazing photograph, as Nina of Nature Remains recently found out (make sure you click on the pic to make it big).
We really need to watch our window strikes! I have seen in the past Ruffed Grouse go through garage windows and die instantly! BTW: you seen David’s most recent post? It’s a good one!